If you are selling more then one type of ticket for a performance, tour or occurrence of your event, then we would suggest using the capacity management to ensure you don't oversell or have to manually update your tickets available.
Once you have set a capacity you can add multiple different ticket, all of which with a quantity available up to the capacity number. The system will then automatically manage the sales between ticket types up to the capacity upon which tickets will then be sold out.
Capacity = 200
General Admission: 200
In this example there are 600 total tickets on sale, but the capacity is set at 200 so only 200 tickets in total will be sold.
You can find out how to set a capacity [here] LINK]