I just want to update my AppStore

For apps on a mobile device:

1. Open the App Store app

2. Select Updates, or select your icon in the upper right corner

3. Click update all or scroll down past the first screen to select individual apps.

Update what app?

What happens when you try?

Do you get an error? If so, what does it say?

Please explain clearly and in as much detail as possible, the issue you are having.