Hi and welcome to you!
While cats will sneeze "occassionally" for various reasons, if its a frequent and ongoing sneezing, this is a sign of a URI (upper respiiratory infection) in felines.
Sometimes runny eyes accompany this, but not always.
URI's can become serious over time if left untreated, but are easily cleared up with meds. I wouldnt reccomend trying to treat yourself until you know the cause.
So if kitty has been sneezing on and off for more than a day, I'd say a trip to the vet is in order.
Good luck with this.