This is a feature for clients with multiple accounts. Perfect for people who want to have just one main account and then toggle between accounts.
Just follow the steps:
Step 1: Log Into the account you want to merge into the main account
Step 2: Once logged in, On the left hand side of the merging account click on Settings
Step 3: Once in Settings, at the top click on Users, then once in the tab click Add Users
Step 4: Click on the arrow to Admin, then enter the email of the Master account email
Step 5: Now your Master account will have a drop down section to switch between both accounts
You can also send an email to a User so they can export the data, view the data, and get a quick overview of that is happening!