Pagerank

A semantic HTML tag that denotes a webpage’s main subject. This is sometimes referred to as the page’s title, but in coding terminology, is different from the Title tag, which is the title that will appear on a browser tab. An H1 subject will only appear on the page itself.

Keyword is a bit of a misnomer, because it can refer to a word or entire phrase that appears in web searches. 

However, in either case, it refers to a word or phrase representing a specific search term and idea. Websites will build strategies to rank for particular keywords that are closely related to their products or services, in order to generate more traffic and leads.

Refers to the speed at which the elements on a web page load. Site speed relates to ease of use, and is also a metric used by search engine algorithms in determining site health.