Welcome to the Q&A Forum

I would suggest to put your resources, content and efforts on the main site, so that it becomes an authority in this domain of bins in general, because not all people now the differences that you as an insider knows. so if i search for bins then i would find all the resources in one place, and google will eventually see that there is a lot of resources in one place regarding this subject matter, and the people who want to link to your site naturally will find that your site has real authority in this domain.

concentrated efforts will always win over diluted efforts.

Thank you all for the responses, but i need to elaborate on some terms and concepts to get the full concept

@gavo when you say not to share a keyword across pages, you mean like "pizza delivery bag" is different than "pizza bag" and a keyword optimized on a page should not be optimized on another page, But what confuses me is that (pizza+bag) is a subset of (pizza+delivery+bag). Wouldn't  the second set of keywords take away from the first set, or we should focus only on results like "pizza bag" and "pizza delivery bag"

@cody thanks for the tip that the number of keyword groups is the number of pages, but if i want to have more resources for a certain term like for example"pizza delivery bag" and i put an article about this topic on the blog wouldn't that post take away from the ranking of the primary page i want to rank for,the post may not be 100% optimized, but it has fresh content,  a well written rich article, well documented, something that you cannot write for a product details page. i want to know how to avoid any technical pitfalls when adding content

I have a niche website that focusses on selling pizza delivery bags, the search keywords that are used by users are about 7 and their are another 15 long tail keywords.

1. The question is do i optimize every keyword per one page only?
2. i have a blog on the website www.prodelpizzabags.com/blog/ if i write a blog post that would "compete" internally with another keyword, what should i do, what are the best practices

I would be thankful for any insights regarding keyword/page optimization