Everything You Need to Know About Internet Speed Tests
An internet speed test measures the real-world performance of your broadband, fiber, or WiFi connection. Unlike advertised speeds from your ISP, a speed test shows what your connection actually delivers to your device — accounting for network congestion, hardware quality, WiFi signal strength, and more.
What Is Download Speed?
Download speed, measured in megabits per second (Mbps), tells you how quickly your device can receive data from the internet. It directly affects how fast web pages load, how smoothly videos stream, and how quickly files download. Most household internet plans are optimized for high download speeds because the majority of everyday activities — browsing, streaming, gaming — are download-heavy.
What Is Upload Speed?
Upload speed measures how fast your device sends data to the internet. This is critical for video conferencing, uploading files to cloud storage, live streaming on platforms like Twitch or YouTube, and sending large email attachments. Most residential connections offer significantly lower upload speeds than download speeds — this is normal for asymmetric connections (ADSL, cable). Fiber plans typically offer symmetrical or near-symmetrical upload speeds.
What Is Ping / Latency?
Ping, also called latency, is the time in milliseconds (ms) it takes for a data packet to travel from your device to a remote server and back. It measures the responsiveness of your connection rather than its throughput. A low ping is essential for real-time applications like online gaming, video calls, financial trading platforms, and remote desktop use. Even a fast connection with high ping will feel sluggish for these use cases.
What Is Jitter?
Jitter measures the consistency of your ping over time. If your ping varies wildly between measurements — say, 20ms one second and 80ms the next — that variation is jitter. High jitter is particularly damaging for real-time communication: it causes choppy audio in phone calls, freezing in video conferences, and erratic performance in online games, even when average latency looks acceptable.