Did you ever hear the term “keyword cannibalization”? That doesn’t sound good, does it? Well, it’s actually one of the most common mistakes among starting SEOs.
Keyword cannibalization occurs when a site has multiple pages about the same subject. Don’t do that! It’s completely senseless to add the same set of keywords to every page of your site.
What I also see a lot is people adding the same keywords in every page title. While those words are not in the content and the page is about something completely different.
This will only confuse Google… Make one page and concentrate on the quality of that page only.