So that it would be handy for you to optimize your post, if you are not using any premium plugin. This brief guide will show you how to write SEO articles with keywords in just a few easy steps. you can also refer my seo checklist, which I refer for search engine optimization. Few Easy Steps to Help you Learn about How to Write Artciles for SEO.
SEO is good, but if you make your post unreadable with a huge number of keywords, you just lose your readers and your Google ranking. It will be enough to include keywords in the title, description, header of your post, and to add them a couple of times to the text itself. Also, make sure that you use the keywords naturally in the text.