Web monetization is a proposed W3C standard that allows visitors to websites to pay the owners of that website without doing anything.
In order for web monetization to work, you need two things:
1) The site owner needs to have an Interledger wallet.
2) The visitor needs to be registered with a web monetization provider.
You can find out more at the Web Monetization website.
Hub owners can add their Web Monetization Wallet pointer URL to their Vito hub in hub Settings, and it will appear in a meta tag in the source code for displaying the hub itself. If someone joins the hub who has a provider enabled, they will stream money to the wallet.