
Many people are writing about the same things and they are writing in similar ways so the algorithms or the Artificial Intelligences behind the search engines are trying to make some good differences between the distinct websites and their articles and they are ranking them and selecting the most relevant words inside them. That's what the keywords are, the most relevant words from your text. The better and most relevant keywords you have in that text the higher your articles and your websites are ranking and easier to be found using the search engines so keep writing often and more and keep thinking and selecting your keywords before starting writing on your website. Adding a blog on each website and using the same keywords on those articles will only increase your ranking and being easier to find on internet.