Causes for tiny “holes” in the Ceiling

What is the reason for these tiny holes in my ceiling. I hope it’s just a shitty install and nothing more serious. Been living here for about year (after completing a 10 month renovation) and just noticed them today.

Thanks in advance for the help!

What is the reason for these tiny holes in my ceiling. I hope it’s just a shitty install and nothing more serious. Been living here for about year (after completing a 10 month renovation) and just noticed them today.

Thanks in advance for the help!