There are two types of SEO factors on-page and off-page seo factors which is helpful to increase your website’s search engine raking
On-Page Factors

1 URL and Domain
2 Keyword in title tag
3 Heading tags (H1, H2, etc)
4 Navigation (few clicks to any page)
5 Freshness of pages
6 And much more…

Off-Page Factors

1 Total incoming links
2 Incoming links from high-ranking pages
3 Anchor text of inbound link
4 Directory links, especially from DMOZ.org.
5 And much more…