ToFu, MoFu and BoFu are simply acronyms for the different parts of the sales funnel: Top of the Funnel (ToFu), middle of the funnel (MoFu), and bottom of the funnel (BoFu). The Top of the funnel represents the awareness and discovery phase of a customer journey. Middle of the funnel represents the evaluation and forming intent phases of the customer journey. And bottom of the funnel represents the purchasing and loyalty phases of the customer journey.