There are a bunch of free, freemium, and paid tools. All of them have advantages and disadvantages. Free tools: – Google keyword planner – Google Trends – Search Insights: Google, YouTube, Bing, Reddit, etc Freemium: – Ubersuggest – Answer the public – Lsigraph Paid tools: – Ahrefs – Semrush – Moz – Majestic Test and…