Motor or vocal Tics are not uncommon at this age. Tourette's is a condition diagnosed after a year of tics with at least one verbal component (in my son's case, throat clearing). Is it not as common as tv documentaries make you think it is.
Tics are best ignored. Drawing attention to them or asking the child to stop it can make the feeling of needing to do it worse and prolong them.
They can be a reaction to stress, even if the child doesn't realise it. It can be after doing something for a long time (having a cough, and still feeling the urge to cough long after the cold has gone).
Best thing to do is make sure he's physically well, no temperature or symptoms of a virus etc and ignore (if he has recently had illness take him to gp as I was told this, but it was just a random occurrence really).
If he's noticed or if children have commented about it reassure him it's not something he can control and lots of children and adults do it. Mention it to his teacher. My son hardly does it at school so his didn't believe me lol. It is worse when they are tired.
If it lasts weeks you can see your gp, if it's impacting daily life a lot you can be referred to a hospital consultant or cahms for cbt. My son is too young for this yet.
You may find a history of it in older people in your family who grew out of it or found how to control the urge so no one sees them.
Perhaps not.
Mostly it will just pass on its own.