Search engine and how is it used

What is a search engine and how is it used (At least two full paragraphs)?
Write a paragraph outlining some good design choices when building a website, from the perspective of search engine optimization.
Write a paragraph outlining some bad design choices when building a website, from the perspective of search engine optimization.
There are steps you can take to ensure all of your search engine optimization; pick an online type of business and layout the steps you would need to know (for example, Home Depot as the business). Step 1 Make a list of Topics you would associate with Home Depot (this should be well thought out and described).
Build a flowchart illustrating the steps (use the basic flowchart symbols attached.)