Once you type
server-topgg enter your server's top.gg link in the channel.
For example: https://top.gg/servers/648123490301640704
After you put in your top.gg link, you'll need to do the final step of setting up the Server Webhooks. You'll get a menu similar to the one below, you have to copy the URL and your uniquely given Authorization code and put it into your top.gg server settings on the site.
To do this, go to https://top.gg/servers/, select your name top right (or Login if you haven't already), select Edit on your server, then scroll down to Server Webhooks and then put the URL and your unique Authorization code into the boxes.
To check that the setup is complete, you can type
vt!setup, react with the book and type
It should say "Completed". If it doesn't then try following the steps above again and click Test Webhook at the end.
Otherwise you can always join the support server here and we'll be there to help in no time.