Run tests during "off-hours" and "peak hours" (evenings) to see if network congestion is an issue [4].
The most widely used tool with the largest global server network [6, 32]. It is highly trusted by ISPs [4]. Internet Speed Test 3.3
If you are seeing as your test result, here is how that stacks up for daily tasks: Run tests during "off-hours" and "peak hours" (evenings)