When you connect WEMO to google home it will discover the devices you have in your wemo setup.
The porccess for doing this is painful but lets accept that as the problem that wemo dosn't really make you create an account and password for your wemo devices. (They should change that...)
But once it is setup if you make any changes to the names of your wemo devices or add new wemo devices the Google Home system has no way to re-sync. So you have to disconnect the WEMO account from your google home (and if you have mutiple family members you have to do it mutiple times) just to get the new device or renamed devices back in sync.
I am not saying this because this is what I was told that I had to do by WEMO support!
C'mon Belkin you need to re-think how your doing Google Home intergration.
Hopefully the new Apple Home Kit system will be much bettter.