It is likely that you have used one of the many network "Speed Tests".

Are they trustworthy? Do they really give us a measure of our network provider's service?

Here's a pointer to a piece that says "not really".

Why You Shouldn't Believe Network Speed Tests

The TL;dr is that the performance of the network link between your home (or office) and the provider can not be reduced to a simple bandwidth number.

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Recently we have seen a small flood of articles and promotional materials that make claims about network latency.

We find many of those claims to be hyperbolic and sometimes quite misleading.

Let us begin, as we almost always will begin, by informally defining the terms "latency" and "jitter".

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The press (tech and otherwise) is filled with grandiose claims of "zero latency".

There is no such thing as zero latency in computer networks.

Some new technologies - 5G and Wi-Fi 6 - may (and probaby do) reduce latency. That reduction is only for that limited portion of the full end-to-end communications path that is carried on 5G or Wi-Fi 6.

In real life, a path between devices on a network is usually composed of many elements (which may change over time.) The name "Internet" itself means a a network of networks. Usually 5G or Wi-Fi 6 will make up only a very small piece of the overall path.

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