Keyword density: Is there an optimal number of keywords?

What is keyword density?

First, let's address what keyword density is not. It is commonly mistaken for keyword stuffing. Keyword stuffing involves the oversaturation of content with keywords, often in an unnatural and forced manner. This practice is frowned upon by search engines, such as Google, and is considered a black hat SEO technique.

Keyword density refers to the saturation level of keywords within a text, indicating their frequency throughout the content. It measures how often the target keyword appears in the text. Keyword density is typically measured as a percentage or as a ratio of keyword occurrences per 100 words.

Keyword density allows us to determine the significance of a keyword within the entire content. This metric also enables us to assess whether the content is overloaded with keywords. As mentioned earlier, this can lead to the undesirable practice of keyword stuffing and spam.

For example: let's say we're optimizing an article for the keyword "brick fireplace". If the keyword appears 30 times in a 300-word article, the keyword density is 10%. In other words, the keyword saturation is 10 times per 100 words (on average, not precisely).

What is the optimal number of keywords?

The optimal number of keywords is not something predetermined. It is rather defined by numerous factors. Let’s take a closer look at all of them.

Purpose of the page and content. Determine the goal: is it an informational, sales, or blog page? Understanding the purpose will help determine the necessary keyword density.

Keyword research. Identify target keywords: research and select the most relevant keywords for your page.

Natural placement. Incorporate keywords naturally into the content, avoiding over-stuffing.

Content length. Write enough to fully address the topic and answer user queries. Consider creating longer, in-depth content. This can often rank higher in search results and provide more value to users.

Competitor analysis. Analyze your competitors' keyword usage and content length.

Continuous monitoring. Regularly monitor your page's performance. If rankings decline, investigate potential causes, including keyword stuffing.

So, what is the optimal number? There's no magic, universal number when it comes to keywords. The key is to use them in accordance with the guidelines mentioned above. The primary goal should be to provide value, quality content, and maintain a natural flow. It's advisable to use synonyms and related terms to avoid repetition and create a more natural reading experience.

Where is it worth putting keywords?

In the content: spread naturally throughout the text.

In headings: (H1, H2, H3), include keywords in these headings to structure your content and signal to search engines what the page is about.

In meta tags: (meta titles and meta descriptions), use keywords to create compelling titles and descriptions that accurately reflect your page content.

In anchor text: (the clickable text in a link), use relevant keywords to help both users and search engines understand the link's destination.

In image alt attributes: (the text description of an image), use keywords to describe the image content, making it accessible to search engines and visually impaired users.

Additionally, remember to optimize different subpages for different keywords. This will help you avoid the undesirable phenomenon known as content cannibalization. Content cannibalization occurs when multiple pages within a website are optimized for the same keyword. This creates confusion in the search engine's matching process, as it's uncertain which page is the most relevant to a given query. As a result, the search engine may alternately display page A and page B for the same search, which is detrimental to the website's overall ranking and should be avoided.

➡️ Read also: What are the dangers of thin, low quality content?