Semantic Markup
Semantic markup is the use of HTML markup to reinforce the semantics or the information that is located in the webpages and web applications. It separates presentation from content.
Section 508-Accessibility
Section 508 refers to the Rehabilitation Act of 1973 law allows electronic and information technology be accessible to people with disabilities.
Search Engine Optimization
Search engine optimization is free search engine results. Making your website more attractive will present more with search engine.