The right way to run an internet speed test (and how I use the results for better Wi-Fi)

This ZDNET guide explains how to accurately test home internet speed with Speedtest by Ookla, clarifies key terms (download/upload, bandwidth, latency, jitter, packet loss), and outlines preparation steps for reliable results, plus practical advice to interpret outcomes and improve performance—using Ethernet, closing background apps, rebooting/updating routers, upgrading hardware or mesh Wi‑Fi, changing bands/channels, securing the network, and contacting the ISP when needed.