Search engine optimization is the process of improving the visibility of a website on organic search results. This is done through optimizing website architecture, internal links, and content for readability, usability, and grammar. SEO requires making content both user-friendly and understandable for search engines. Key factors are creating high-quality content focused on relevant keywords and answering user search queries directly.

1. SEOSearch Engine optimization
SEM, SMO, SEM

2.  Search engine optimization is the process of improving the visibility of a
website on organic ('natural' or un-paid) search engine result pages
(SERPs).
 This goal is accomplished through implementation of search engine friendly
website architecture, optimized internal navigation and link landscape, as
well as optimization of the content (comprised, at a minimum, of readability
& usability improvements, and grammatical corrections).
 SEO is as much art as it is science, but at its core it is the discipline of
making user-friendly & useful content understandable and easily digestible
by search engines.

3.  Content is king. You’ll hear that phrase over and over again when it comes
to SEO success
 Get your content right, and you’ve created a solid foundation to support all
of your other SEO efforts.
 More than anything else, are you producing quality content? If you’re selling
something, do you go beyond being a simple brochure with the same
information that can be found on hundreds of other sites?

4.  Perhaps the most important SEO factor after creating good content is good
keyword research.
 You want to create content using those keywords, the actual search terms
people are using, so you can produce content that effectively “answers” that
query.
 For example, a page about “Avoiding Melanoma” might use technical jargon
to describe ways to prevent skin cancer

5.  Search engines are increasing trying to show direct answers within their
search results..
 Questions like “why is the sky blue” or “how old is the president” might give
you the answer without your needing to click to a web page.
 There’s some debate over whether having your content being used as a
direct answer is a success or not. After all, if someone gets the answer they
need, they might not click, and what’s the success in that?.