We use them every day, but what is the overall purpose of a search engine?

The purpose of using a search engine is to use specific wording to narrow down your search..

Explanation:

example; u need to find more info. on your topic; say the topic is on measles..you will be suprised on how many results you get... hense, the first topic listed is what u are looking for. but explore the whole list..

end result is finding the topic that closely resembles your main topic, question, or hypothesis..

answerenforce the organization's security policy;

the major difference between the two is the objective and the reward of the game. candy crush has a puzzle theme with the objective of meeting a specific quota of points or objects, you are able to gain access to the next level and compete with peers on the process. on duolingo the objective is rather different, you are given sets of questions for you to answer for you to move to the next level and as for the reward, you are able to learn available language as this is an app developed to teach the user about other languages.