Ahrefs help!!

I will answer your last bit. If the traffic to a particular page on SERP is 2000, it simply means that a particular article has more keywords that are sending organic traffic to it. It doesn’t mean that if the SV is 200 for the main KW on the title, that the traffic will be equivalent. That is just for one KW. A post can contain as many as hundreds to thousands of KWs.