Likely this data comes from google's keyword tool, which has a paid API. semisland.com/semrush.com has alot of good data of this type. Also, they scrape the ad

Likely this data comes from google's keyword tool, which has a paid API. semisland.com/semrush.com has alot of good data of this type. Also, they scrape the ads and organic rankings for a ton of keywords.