Where do the search volumes come from ? They don't seem to correspond with tools like ahrefs, semrush, etc

The search volume data in the keyword research tool is obtained from the Google Ads API.

It represents the average number of searches that have been performed for a particular keyword over the past 12 months, either globally or in a specific location, depending on your settings.

It is important to note that search volume data should not be taken as a precise prediction of the traffic that your website will receive.

Instead, it is best to use search volume data as a rough guide to help you identify potential opportunities for content creation, rather than relying on it as a definitive forecast.

You can learn more about how Keyword Tools get their search volume data here.