This document discusses link farming in online social media platforms like Twitter. It explains that link farming involves users exchanging reciprocal links or follows to improve their ranking in search engines and influence scores. While link farming aims to boost metrics, it is considered spamming behavior. The document notes that both spammers and some legitimate users engage in link farming on Twitter to gain more followers and appear higher in search results. It also presents data from a study of a large Twitter dataset that found a significant percentage of accounts, links, and clicks led to spam, malware, or scam sites.