hi if a same buyer buy my gig again and again it will earn me level 2 or i need different buyers thanks
It can be the same buyer as long as the gigs are purchased separately and are honest purchases with real deliveries. Using a second account to buy your own gig or otherwise getting fake sales can get you banned.
It isn’t uncommon to see repeat buyers on most gig types, but if one buyers purchases a lot at once (like 40-50 gigs in a day) could look suspicious to future buyers even if they are real purchases. I’m not saying you shouldn’t have a legitimate buyer do it, you can, just giving you a heads up.
Yes, it will help you to earn a level 2 badge but don’t do anything against fiverr ToS to make that happen just like @fonthaunt said.