A install is a mobile ad fraud strategy. It's accomplished by fraudsters using device emulation applications in virtualized environments (on server hardware) to fake installs. The purpose is to maintain advertising revenue. Fake installs defraud everyone together the advertising series - earning money from advertisers, publishers and networks.
Beyond missing invest, fake installs introduce data. This may result in difficulties that are substantial for advertisers. By way of instance, fake installs will enroll as users that have gone dormant as soon as they've finished the install (or attained the post-install excellent goal). If those installs are credited but not recognized as fake installs, then these behaviour can harm metrics with time, leading to investing in stations that are rife with fraudulent action, or cease completely, missing out on legitimate users.