In On Page Optimization there are some important factors like
1.
Title Tag : The <title> tag is required in all HTML documents and it defines the title of the document.
2.
Meta tag : Meta elements are tags used in HTML or XHTML documents to provide structured metadata about a Web page.
3.
Keyword : Keyword research is one of the most important, valuable, and high return activities in the search marketing field.
4.
Sitemap : A site map (or sitemap) is a list of pages of a web site accessible to crawlers or users.
6.
Internal linking : Internal Links are hyperlinks that point at (target) the same domain as the domain that the link exists on (source).
7. Bread crumb : A Web site navigation technique. Bread crumbs typically appear horizontally near the top of a Web page, providing links back to each previous page