Does anybody know what type of tire is SCHWALBE CITIZEN ACTIVE? I have a tiny punctures in it and have no idea how to fix. May be I wrong but I think it is tubeless. Should I bring it to service or is it possible to fix myself?
A quick google shows https://www.schwalbe.com/en/tour-reader/citizen.html
Its a straightforward clincher tyre that may be used tubeless, but may be used with a tube.
Best thing to do is take the tyre off and see if there's a tube inside.
Do note that tubeless tyres can be run with tubes perfectly well.
From there, your question devolves to either :