It's like saying "front door" - it's the door located at the front of the house. In the same way, the frontal lobe is the lobe located at the front of the brain.
While this is the literal meaning, it's important to remember that the frontal lobe plays a crucial role in higher-level cognitive functions like decision-making, planning, and personality. So, while "frontal lobe" simply refers to its location, it's a region of the brain that's incredibly important for our overall functioning.