You pay for a fast plan. This device may only be getting part of it.

Slow can mean a few different things

The pipe. The speed you buy from the internet company. If the whole office is under that number, the modem or the plan itself may be the story.

The air. Wi-Fi in a brick building, a microwave, or a guest network sharing the same box. People feel this as “Zoom freezes but the phone on cellular is fine.”

The computer. A machine that's out of disk, out of updates, or running something heavy. The free scan separates “the internet” from “this PC.”