4) On page SEO:
What is on page SEO?
On page SEO is the practice of optimising individual webpages in order to rank higher and earn more relevant traffic in search engines. On page, refers to both the content and HTML source code on the page that could be optimised.

On page SEO is the foundation for a good SEO, meaning what happens on your page, the number of keywords, what you put in the article, how long your article is, what anchor text you are using, if there is a video embedded in the article, how do you call the pictures embedded in you blog post and website content. There are a lot of things included in on page SEO, and if you don’t do them properly then all your efforts are wasted. All these on page SEO are free to do.