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Hi Hasan,
Apologies for the ambiguous response. What i meant was tools like Ahref, Semrush, Moz, Ubersuggest and others have historical data which they use like clickstream, google ads api data, sometimes data they buy from third parties and even data they get from scrapping indexed pages. In this case what data sources will we use or should use to build this backend data to control and maintain the accuracy for seo tools. How will we pull or overcome this data input requirements that other seo tools use? this is what i was wondering and wanted your advice on.. thanks.