You will level up on GoClub when you reach a certain milestone of XP as follows:
The total XP that you have collected, your level, and the number of XP that you need to collect to level up can be seen on the GoClub main page.
The more you order/transact on Gojek app, the more XP you will get, the faster you will level up! Read more about how to get XP here.
However, your level can also get downgraded if you fail to collect a certain amount of XP within 6 (six) months from the time you reach a new level. Read more about it here.