When you click on the My Account option, the Account Overview tab is pre-selected.

This way, you are always able to get a brief overview of your account status regarding:

From the Account Overview section, you are able to see basic information regarding your MarineTraffic account. You are also able to change your MarineTraffic access credentials (password).

Under the Billing section -> My Subscriptions tab you can see your selected MarineTraffic Online Services (purchased or in a trial), their expiration date, and status (active/inactive).

From the My Fleets section, you can view info regarding your Fleet(s). The overall size of your Fleet(s) depends on the Fleet Add-on you have selected or Plan.