how search engines work?

Write a 2-3 page, general report explaining how search engines work (In general, and it can be double spaced but use 12pt font  Times New Roman, or something similar). There is lots of informationonlineon the process. Please stick to credible sources (and be sure to cite them in APA style). You may come across lots of mathematical formulas regarding how to rank search results, but no need to explain all of this (unless you want to). Focusing on the main functionally of how search engines work is fine for this assignment.