Keyword Tool is one of the popular tools for keyword research. You can use it to discover thousands of relevant long-tail phrases related to your business domain. It uses Google Autocomplete to generate tons of hidden keywords that Google Keyword Planner fails to uncover. It offers in-depth keyword suggestions and analysis for many search engines. These include Google, YouTube, Bing, Amazon, eBay, Play Store, Instagram, and Twitter. This keyword tool, io, is for business owners. Plus, online marketers, freelancers, SEO experts, and content creators.