What is the best free keyword research tool for SEO?

Hi Saba! When it comes to free keyword research tools for SEO, I would recommend starting with Google's Keyword Planner.

The Keyword Planner is part of Google Ads (formerly Google AdWords), but you can access it and get keyword suggestions without having to run any paid ad campaigns.

Some of the key features that make it valuable for SEO include:

- Huge keyword database straight from Google's data

- See search volume and trend data for keywords

- Get ideas for related keywords you may have missed

- Filter and segment keywords in various ways

- Pair with Google's auto-suggest and related searches

While the data can be a bit inflated and focused on paid search, it's still an extremely comprehensive and free keyword tool right from the biggest search engine.

Another excellent free option is Ubersuggest. Just enter a seed keyword and it will provide:

- Keyword suggestions and variations

- Estimated search volumes

- Content idea recommendations

- Ability to see which keywords your competitors rank for

Other useful free tools are Answer The Public for visualizing search inquiries, and Keyword Shitter for compiling large keyword lists.

Paid tools like Ahrefs, SEMRush and Moz have more robust features, but I've found Google's Keyword Planner and Ubersuggest to be the most capable free options for basic keyword research purposes.