Keyword research is a core SEO task that involves identifying popular words and phrases people enter into search engines to figure out what to rank for. Researching keywords gives marketers a better understanding of how high the demand is for certain KWs and how hard it would be to compete for those terms in the organic search results.
In blogging, content is said to be the king, and that's perfectly true. But if the same content is on an incorrect KW, nothing is useful. So you always need low competition, high Search volume KWs which are profitable.
What you will get with keyword Research?