can you expland me seo by keyword?

Hi, just wonder that if i have a keyword, i want rank it higher on google then i set that keyword to my hone page, customize homepage and drive more high quality traffic on my homepage, so it will rank higher? then people when search that keyword, my page will have chance appear on google?
The same to post/ video?

Hi, I advise you to get to know these articles first:
1) https://ahrefs.com/blog/keyword-research/
2) https://ahrefs.com/blog/best-keyword-research-tools/

you need better keywords for related queries.