SEO isn’t part of marketing, but having some knowledge on it will help you optimize your content for search engines, or help on-page optimization building backlinks.
The search engines will rank your webpage/post according on how many links get back to that page or article, how many people visited…
Creating great content will certainly help a lot.
If you’re using WordPress, you can use Yoast plugin which will help you optimize your article. Use 2-5 relevant keywords which will increase your Seo too.
Think about what your audience will search for and use those keywords.
Use Ubersuggest for that. Don’t forget that Seo is just to help your content be found by the search engines.