If you’re running a plumbing, HVAC, or electrical company, you’ve probably heard people throw around terms like CPL  and CPA  when talking about marketing performance. But most agencies never explain what they actually mean — or why they matter. Here’s the truth: confusing these two metrics is one of the fastest ways to waste money on ads. CPL (Cost Per Lead)  shows how much it costs to get someone to raise their hand. CPA (Cost Per Acquisition)  shows how much it costs to tu