You might do this for example if you created a club but had never used it. You would then need to assign this club to a tag slot to be able to start tracking that club.
To assign a club on your mobile device please follow these instructions:
1) Login to your app.
2) Navigate to the My Bag screen on the app.
3) Tap on the tag slot that you want to assign a club to. For example if you wanted to assign your 3 iron to the X2 slot you would tap on this slot.
4) You will then be taken to the 'Assign Club' screen. You should see your unassigned created clubs under the 'Other Clubs' header. Tap on the club you wish to assign. If you wanted to create a new club you can do so here as well.
This will now have assigned that club to your chosen tag slot. The screen will return to your My Bag screen for you to see this.