How to check the presence of a keyword on a site from the list?

Question

data mining

There is a list of names of ~5 thousand institutions.
You should try to find the sites of these institutions and check if they have information (availability) about the keywords.
I've never worked with this before, I don't even have any ideas.
Can anyone give a general idea in what direction to look for? Thanks

Answer 1

google is not a problem
https://www.zyte.com/smart-proxy-manager/#spm-pricing
https://brightdata.com/
but recognize the data whether it is a website etc. it will be more difficult,
I would start with who already has such a list - 2Gis, all sorts of Zoon and Google Business))