In 2026, when AI has made everything, including Google’s ranking algorithm, all writers need to write content strategically. Do you still think that this is the game of keywords as it was before 2023? No and never. That’s the thing you need to know!
So, with AI mode in Google and all the LLMS tools, how many SEO keywords should you use? It doesn’t mean that to rank in AI, you just use keywords with my given method. You need to know that for AI ranking, you have to do much more than SEO, for example, building domain authority in Google, creating the LLM.robot.txt file, and writing the content as Google and all LLMS tools want.
Keeping the topic to the point, for now, I will tell you how many SEO keywords you should use for AI ranking and AI citation. So let’s get started!!
Who am I? My name is Alizy, an SEO specialist and content writer, and the CEO of SEOZA online agency. I am passionate about giving seo tips for free. I have done 50+ projects on Upwork in SEO, of which were writing-related, so here you are reading content written by an expert.
How many seo keywords should you use?
Some things are the same as before the AI, and among them, keyword density is what you need to understand before knowing the keyword placement in your content. The word count of your content still matters whenever SEO keyword optimization comes into play. However, word count is not a ranking factor, but it does indirectly affect matters.
In terms of depth and detail, the longer articles are better, and for SEO keyword optimization, we have to place our primary and all LSI keywords based on word count. The purpose is always to make the content readable without doing keyword stuffing.
5 Factors You Need to Know Before You Write the Content
For better keyword placement, considering word count or content length alone is not enough. Now you need to move smartly, because there is not just Google; there is Google+AI mode+LLMS.
Word count of the content may be a visible factor for everyone, but here are 4 other very important factors that affect how many SEO keywords you should use. First, understand all of this, and then think about writing AI-rankable content.
1) Keyword Type
Keyword type refers to the primary keyword we are using. As you know, there are three types: broad keywords, short-tail keywords, and long-tail keywords, so all these help in deciding SEO, and how many keywords should you use?
For example, if there is a broad keyword that is known for consisting of one or two words, then it also comes naturally in the content. Indeed, you cannot control its density by using the same keyword. However, you can use its alternatives or LSI keywords instead.
Note: Avoid broad keywords, especially for newly registered websites. I don’t recommend targeting these keywords for information blogs. When you build high domain authority, you’ll start ranking on these broad keywords automatically. However, if you are running a commercial website with a DA of +40, then you can target broad keywords for your unique product.
In this situation, for instance, we have short-tail keywords consisting of 3 or 4 words. This type of keyword also affects how many SEO keywords you will need to use in your content. For example, if our primary keyword is a short tail (3 or 4 words), it also comes more naturally throughout the content. But we can control these types of keywords by replacing a single alternative word or by replacing completely related or LSI keywords.
When you want to write content on a long-tail keyword, choose one that’s 5+ words. So, these long-tail keywords naturally appear less frequently throughout the content than broad and short-tail keywords. Especially, if these long tail keywords have a question at the start, such as
“How many seo keywords should I use?” As you may have arrived here by searching for this keyword, you can see that it contains the question word “How”. In this situation, you need to place it strategically without keyword stuffing, because readers aren’t coming here to see the exact questions again and again.
At the same time, when we talk about the placement of a long-tail keyword that does not have a question word, such as “best keyword placement in the content,” its placement will be easier than that of a questioned long-tail keyword.
2) Keyword Search Intent
This is the part where the keyword placement strategy changes everything. Keyword search intent means what the user actually wants to know through the keyword.
As there are four keyword intents: informational, commercial, navigational, and transactional, the best keyword placement also depends on these search intents. Here’s the above factor (keyword type) will also emerge, because this is the game of all factors, and when you understand this, you will become a professional keyword researcher.
Let’s see the role of keyword search intent with all factors in deciding how many seo keywords you should use
1) Informational Intent
Informational intent means that the user wants a guide with a detailed answer. So we need to explain the topic rather than repeating the exact keywords.
If the informational keyword is short tail and doesn’t start with question words such as “what”, “why”, or “how”, then you can do strategic repetition by also using LSI keywords.
On broad informational keywords, keywords are used naturally and automatically, but here, you need to achieve topic depth through keyword mapping.
If you write a long-tail informational keyword over and over again, the entire content will feel very robotic. Because long-tail keywords are already specific and come with a clear usage intent.
And especially if these informational keywords are question-based, like “how to clean a dog’s teeth without brushing,” repeating these types of keywords is clearly wrong, whether they’re short-tail or long-tail. Because repeating them feels unnatural and gives the AI a built-in feel. The best place to start is here: answer the question directly and then use variations of the keywords.
For example, if my primary keyword is “how to clean dog teeth without brushing, again and again, you have to use this in the meta title, intro, and first H2, image alt text, conclusion, and faq’s.
Also use its LSI keywords throughout the content, such as;
- clean dog teeth naturally
- dog dental care at home
- ways to clean a dog’s teeth without a toothbrush
- natural dog teeth cleaning methods
Just ensure the overall keyword density stays between 1.5% and 2%.
2) Commercial Intent
Commercial intent keywords have two types;
1: shortlisting keywords:
it means a commercial keyword through which the user just wants to investigate that product or service. In these keywords, modified words such as “best”, “top”, “affordable”, etc. are used, which is why there are more chances that these keywords come in 3 to 4 words or 5+ words.
The simple statement is that shortlisting commercial intent keywords is either short tail or long tail, reducing the chances of being broad type. Some examples are;
→Best face wash for oily skin (long tail)
→affordable skin care products (short tail)
→best dog food brands (short tail)
Now the real question is how many of these types of keywords you should use in the content. Right? The real answer still depends on other factors, but here’s a little hint for you;
1) shortlisting short tail keywords: You should use the exact primary keyword in the main intro, H2, and five to six times throughout the content, also integrating LSI keywords to ensure 1.5% to 2% keyword density.
2) Shortlisting long tail keywords: Such as “Best face wash for oily skin”, this type of keyword will be used less frequently compared to the above 1 type. The longer the keyword, the more chances there are to use less in the content.
2: Direct Buying Keywords (Transactional):
These keywords mean the user has decided to take action, whether it’s buying a product or any service. In these keywords, words such as “buy”, “online”, “order”, etc., are used.
As the user has decided to take action, there are chances that these keywords are either broad or short tail, reducing the chances of being long tail types. For example:
- Buy CeraVe cleanser (short tail)
- order dog food online (short tail)
- Nike shoes (broad)
- Amazon face wash (short tail)
In this matter, Google needs a direct and clear signal, “this page is actually a buying/action page. So the exact keyword can be used more prominently. Repetition here is tolerated even more than in commercial shortlisting keywords, because buying pages are naturally repetitive.
Another thing you need to know about direct buying commercial keywords, “the variations of keywords or simply LSI keywords are decreased because user specificity increases, because he/she want;
exact product
exact brand
exact action
So, you should use these types of keywords in headings, offer headings, price area, CTA buttons, and throughout the product description.
Note: Direct buying commercial keywords is technically transactional because the user may want to buy the product of any spesific brand, meaning that the action is specific and the brand is also spesific.
3: Navigational keywords
The real psychology of navigational keywords is different. The user already knows the destination, and he/she just use Google as a path to reach that destination. They may be broad, short-tailed, or long-tailed, for example.
Facebook login
YouTube studio
Royal Canin puppy food
Grammarly official website
Here, Google specifically is looking for brand and entity recognition. For example, a keyword “Canva login” has two words, “canva” and “login”, both of which are exact terms with a strong signal.
But if you use generic variations like “design platform account access,” then the intent will be weak. Here, we need less repetition, and knowing this difference is most important.
Informational:
→ explanation-heavy
Commercial:
→ comparison-heavy
Transactional:
→ conversion-heavy
And…..
Navigational:
→ clarity-heavy
That’s why keyword stuffing feels spam in the matter of navigational keywords, so the keyword placement should be very strategic, such as in slug url, heading, and CTA button, etc. That’s enough
3) Keyword Placement Position
Keyword placement changes according to keyword intent.
If the keyword is informational, such as “How many SEO keywords should I use?”, the exact keyword is usually placed strategically in the title, introduction, one heading, and conclusion, while the rest of the content uses variations like “keyword density” or “SEO keyword usage” to keep the writing natural.
If the keyword is commercial, such as “best SEO tools,” placement becomes more visible because the user is comparing options, so the keyword often appears in the title, H1, comparison headings, tables, product sections, and CTA areas, for example, “Best SEO Tools for Beginners” or “Top Free SEO Tools.”
If the keyword is transactional, such as “buy tomato seeds online,” exact-match placement becomes even stronger because the user is ready to take action, so the keyword is commonly placed in titles, pricing sections, product descriptions, and CTA buttons like “Buy Now” or “Order Today.”
In navigational keywords, such as “Canva login” or “Ahrefs dashboard,” repetition is usually lower, and the exact brand keyword is mainly placed in the title, URL, first paragraph, and CTA areas, so users can quickly.
4) Keyword Competition Level
Keyword competition level directly affects how carefully and strongly you need to place keywords in your content. When a keyword has high competition, many websites are already optimized for it, so simple keyword usage is usually not enough.
In these cases, exact-match placement becomes more important in high-value positions such as the title, URL, H1, introduction, and major headings because Google compares your relevance against many strong competitors.
For example, a competitive keyword like “best SEO tools” often requires stronger visibility, semantic support, related subtopics, and clearer topical coverage.
On the other hand, low-competition keywords usually need less aggressive optimization because fewer pages are targeting them. A long-tail keyword like “best SEO tools for beginner gardeners” may rank with fewer exact repetitions and more natural writing.
Competition level also changes how much semantic expansion is needed; highly competitive keywords often require broader topic coverage, related entities, FAQs, comparisons, and supporting keywords, while low-competition keywords can rank with simpler and more focused content.
5) Word Count of the Content
Word count plays an important role in how keywords are placed and how effectively they perform in SEO. In short content (around 300–500 words), keyword placement is very limited and focused, so the exact keyword is usually used in the title, introduction, and maybe one heading to avoid sounding repetitive or forced.
In medium-length content (800–1500 words), there is more flexibility, so keywords can be naturally distributed across headings, subheadings, and body paragraphs along with variations and related terms.
In long-form content (1500+ words), keyword placement becomes more spread out and semantic, meaning the exact keyword is used in key positions like title, intro, H1, and conclusion, while supporting sections use related phrases, LSI keywords, and contextual variations.
As word count increases, keyword repetition feels more natural because the topic coverage is broader, and Google sees the content as more complete and authoritative.
Always check your keyword density, which is based on the word count. Here’s the formula is;
Keyword Density (%) = (Number of times keyword appears ÷ Total word count) × 100
The ultimate answer of how many seo keywords you should use is keeping 1.5% to 2% keyword density by using the above formula.