Those aspects or elements of a website that are located on your website (such as keywords). You are largely in control of on-page factors.
A reference to the elements on your site and their role in your rankings, for example, keyword density, title tag relevance etc.
Factors that determine search engine positions that occur internally within a page of a website. This can include site copy, page titles, and navigational structure of the site.
All the aspects of a Web page that may be seen by the user, including the coding. Proper optimization of on-page factors can enhance a page’s ranking. On-Page factors are also important for SEM as the search engines attempt to rank your advertisement based upon the relevance of the landing page to the ad copy.
All the aspects of the actual code that makes up a website, that contribute to a website's ranking each search term. Traditionally, on-page factors were all a search engine took into account when ranking websites, but after the success of Google's PageRank system, search engines now use a variety of off-page factors as well. On-page factors, like keywords in meta-tags, are no longer as important in gaining a higher ranking.
A reference to the elements on your site and their role in your rankings, for example, Meta Tags, Code Cleaning relevance etc.