“…This approach was one of the most preferred models for researchers in the included studies used for advertising. The cost per click model budget is set at a daily, weekly, or lifetime spending limit depending on the researcher's choice [18,30,33,38,40,41,46,47,48,51,54,55,59,60,64,69,71,73,74,75,77,80,93,102,111,126,129].…”