508, Semantic Markup and SEO
Semantic HTML is the use of HTML markup to reinforce the semantics, or meaning, of the information in webpages and web applications rathar than merely to define it presentation or look. Semantic HTML is processed by traditional web browsers as well as by many other user agents. CSS is used to suggest its presentation to human users.
A semantic element clearly describes its meaning to both the browser and the developer. Examples of semantic elements are: form, table, and article all with the tags around it. Many HTML tags have semantic meaning. That is, the element itself conveys some information about the type of content contained between the opening and closing tags.
Section 508 - Accessibility
Section 508 of the Rehabilitation Act of 1973 requires Federal agencies to make their electronic and information technology (EIT) accessible to anyone with disabilities. The law applies to all Federal agencies when they develop, procure, maintain, or use electronic and information technology. Under Section 508, agencies must give disabled employees and members of the public access to information that is comparable to access available to others.
On January 18, 2017 the Access Board issued a final rule that updates accessiblity for information and communication technology (ICT) in the federal sector covered by Section 508 of the Rehabilitation Act. The rule also refreshes guidelines for telecommunications equipment subjecy to Section 255 of the Communications Act.
Search Engine Optimization (SEO)
SEO is the process of getting traffic from the "free", "organic", "editorial", or "natural" search results on search engines. All major search engines such as Google, Yahoo, and Bing have primary search results, where web pages and other content such as videos or local listings are shown and ranked based on what the search engine considers most relavant to users. As an internet marketing strategy, SEO considers how search engines work, what people search for, the actual search terms or keywords typed into search engines and which search engines are preferred by the targerted audience.
How are they all related?
All three of these are apart of each other, Section 508 would not be able to be applied without semantic markup, SEO takes how well someone has made their website, and determines whether or not it is well ranked, including making sure the Section 508 is being applied properly, so that anyone can access the sight. Without semantic markup neither SEO nor Section 508 are possible to be successful.