Question

Define keywords? Explain

Answer 1

A keyword are words that can describe content. Used on the internet, it referred to the words you type in the search engines, to find contents on the internet.

History: In the beginning, libraries, search engines and other data bases used a meta tag system where a person decided which keywords describe the book or article. Like the keywords you see for this article in the bottom of this article.
You still find this system in libraries and other closed systems, where people that have permission to enter data, are thinking of servicing the users and not to promote some products on behalf of other producers.
In the early days the search engines functions in the same way, but web masters began to take advantage of the simple way the search engines were working. They entered keywords that were popular in searchers, but the page contents were about something else, which offen could be monetized.
That meant the breakdown of the search engines 100% bases on keywords. Search Engines began to apply other method to distinguish good contents from low quality content and contents that were trying to deceive the search engines.

Assuming that you are trying to find articles like this one, you will have more luck finding this article with the keywords in the Example.
The keywords, in Example on the opposite, are too general to describe anything specific and you are likely to find big web sites on a random subject. The reason is that the keywords, in the example on the opposite, are words used in many websites and not only used in the contents you are looking for.

Future: Every time the search engines find another method to sort high from low quality content, there are armies of web masters that try to manipulate the results so they can get more searchers to their site and earn money.

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