Linkko.io is a platform where users can monetize their data and attention by watching advertisements. Users create an account, connect their wallets in read-only mode, and start earning by receiving messages and deals from brands tailored to their interests. This process allows for a maximum of 10 non-skippable ads per day, with earnings varying based on the assets and net worth associated with the user's wallets. Linkko emphasizes user safety in wallet connections and offers weekly cashouts to non-custodial wallets.