Link farming is a type of online advertising fraud where fraudsters attempt to: create a series of bogus Web sites, all linking back to a page, in the hope of increasing that page's results in organic search. pack a Web site with unrelated keywords in the hope of luring users who wouldn't normally visit a Web site. search keywords linked to rival ads in the hope of generating impressions without clicks to lower the performance rank of these ads. frame a rival by generating bogus clicks or impressions that appear to be associated with the rival, in the hope that this rival will be banned from an ad network. generate bogus impressions that can be linked back to a rival's ad to exhaust the rival's CPM ad budget.

answer; i believe the correct answer is 50 pounds;

we can all learn from our past mistakes because we all have different ways of learning different types of techniques. my way may or may not another classmate remember and have the repetition to acknowledge such standard. such as remembering acronyms. using abbreviations to us remember keep things in order in our memory. this us figure out what comes next in the sequence. if so, what we have is a sentence of just letters all in caps. we either know the meaning or have no idea what it stands for. most of the time we know the meaning and context. but most of us who don't know, should learn by having a quick glance at what needs to be remembered. such as repetition in the memory for acronyms. one way that me, is the fact that i'm always doing math and english assignments. so we have to remember specific meanings such as soapstone for documents, such as citing correctly. or pemdas for doing the equations correctly, even if it's the super long way. this works for everyone. you just have to find what works for you by practicing and repetition daily.