While you can often start with a keyword and create a piece of content around that term, sometimes your content already exists, and you need to figure out how to match it to keywords. To do this, create what's known as a "content to keyword map." Creating this map can help you understand the impact of your existing content and identify weak links or gaps that need filling.
One of the things Google looks at when ranking a page is the content on that page. It looks at the words on the page. Now picture this, if every word on, for instance, a blog post about a digital piano is used 2 times, then all words are of equal importance. Google won’t have a clue which of those words are important and which aren’t. The words you’re using are clues for Google; it tells Google and other search engines what the page or post is about. So if you want to make Google understand what your page is about, you need to use it fairly often.
This is why developing a list of keywords is one of the first and most important steps in any search engine optimization initiative. Keywords and SEO are directly connected when it comes to running a winning search marketing campaign. Because keywords are foundational for all your other SEO efforts, it's well worth the time and investment to ensure your SEO keywords are highly relevant to your audience and effectively organized for action.