Keywords let the search engines know what your website (or article post/page is about). Therefore when receiving a diversified anchor text (keywords) with multiple variations that are related (plus exact keyword or anchor text) it will give you a boost in rankings for those keyword phrases people type into Google, etc.

Keyword is a single word, and while a combination of those keywords makes phrases. These keywords or phrases are used by the search engines to populate the subjects over the internet. Search engine stores keywords in the database, and when search is done, it will come up with the best possible match.

Keyword is a solitary word, keeping in mind a mix of those catchphrases makes phrases. These watchwords or expressions are utilised by the web search tools to populate the subjects over the web. Internet searcher stores watchwords in the database, and when hunt is done, it will concoct the most ideal match.

Keywords is to push your website in top position in SERP page...

Keyword plays an important role as the keyword play a key role to rank your website

Oh, it just tells the search engine whats your site is all about.

They are used to rank your website higher in search engines.