There are various tools through which you can effectively make out your keyword research. The best one which is mostly being utilized is Keyword Planner.
You can also use 'Bing Keyword Research', 'SEO book keyword tool', 'WordStream', 'WordPot'. These all are free tools.
'SEMrush', 'Moz keyword analysis tool', 'keyword spy', 'wordtracker' - these all are paid tools.
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I think Google Keyword Planner is the best tool ever now. However you can use another tools such as spyfu, semrush, market samurai,...all of them are good and worth to use.
Google Keyword Planner is a great tool but there are quite a few other great options out there. Here,s some of the best on the market in my opinion. Word Tracker, MOZ, SEMRush, Advanced Web Ranking, Word Stream.