hello Dear I'M seo expert 4 year experience in seo What is SEO? Search engine optimization (SEO) is the process of changing the position of a website or a web page in a search engine's search results (Organic or Natural results). Types of SEO Two Types of SEO are On Page Optimization Off Page Optimization SEO Techniques: Two SEO Techniques are White Hat SEO Black Hat SEO ( Negative SEO ) What is On Page Optimization? On-page optimization is one of the types of SEO that refers to factor that gives outcome to a website or web page ranking on SERP ( Search Engine Results Page ). On-Page Optimization means controlling a webpage by you or by your page coding. Some of the examples are HTML Code, Meta Tags like Meta Title, Description, Content Quality, Keyword Density, Outbound Links, Image Alt tag etc. What is Off Page Optimization? Off Page Optimization is also one of the types of SEO that are not controlled by the page coding. Examples of Off-page optimization Link building, Blog posting, Image Sharing, Document Sharing, Video Sharing, Info graphics submission, Increasing Page Rank and Page Authority, Article submission, Getting high quality links from relevant sites etc. What is Page Rank or PR? Page Rank is a rank that has been provided by Google for each and every Webpage. This Rank ranges from 0 to 10. This Page Rank is calculated by an Algorithm used by Google Web Search Engine. PR of a web page is based on the number of backlinks that received from other high PR webpage. What is a Backlink? Backlink means incoming links to a website or webpage. Inbound links are always better than outbound links. Those links are also known as incoming links, inlinks, inward links etc. Getting backlinks from high PR and relevant site is always good. Inlinks from .org, .edu sites would increase your website or webpage ranking on SERP. Do-follow links are better than No-follow links.