get https://api.similarweb.com/v4/website/{domain.com}/traffic-sources/nonbranded-search
Returns the non-branded keywords for a given domain, keyword traffic share, change %, keyword volume, CPC, URL, keyword position, and the number of non-branded visits on desktop.
Price: 1 hit per request
To retrieve 'Last 28 days', remove the start_date & end_date parameters from the URL.