They perform functions like preventing the same advertisements from continuously reappearing, ensuring that advertisements are properly displayed for advertisers, and in some cases selecting advertisements that are based on your interests.
Benza imisebenzi efana nokuvimbela isikhangiso esifanayo ukuthi singaveli futhi, ukuqinisekisa ukuthi izikhangiso zikhonjiswa kahle abakhangisi, futhi kwezinye izimo bakhetha izikhangiso ezincike kuzintshisekelo zakho.