When it comes to picking the right keywords, there are mainly two types of keywords, Long tail keywords, and Short-tail keywords. The long tail keywords are less competitive compared to the short tail keywords.
keyword.io is another powerful keyword research tool. This tool provides highly relevant keywords or auto-suggest queries from Google, Amazon, eBay, Yandex, Bing, Youtube, Wikipedia, etc.
Keywords Everywhere is a chrome extension and it is also the best Keyword research tool that provides average monthly searches, CPC, and competition of keywords.
Ubersuggest is a popular tool by a well-known SEO Expert Neil Patel. This tool shows insights such as Search volume, SEO difficulty, paid difficulty, and cost per click.