As a reminder, keywords are terms composed of one or more words that correspond to the subject present in an article or in a page. These words allow Google to associate these articles or pages with the requests of Internet users in order to present them relevant results.
The number of keywords corresponds to the number of words (excluding stopwords) on your page. For example, if in your content there are the words "shoes" and "green shoes", the analysis will indicate that there are 2 keywords.
If in the content of your page there aren't any or very few keywords, Google and other search engines consider that your page has no added value so they will not rank it.
In order to be ranked and to have an optimized page at the level of keywords, we recommend :