But why do we have to do a bandwidth test? What are the factors that influence the decrease in internet bandwidth? Well, the performance of your internet connection depends on several factors that can affect the speed. Among other things, the location of your internet connection and its technical eligibility are very important points. The quality of your computer or tablet also affects the speed. Indeed, a poorly performing PC can lead to poorer speedtest results. If you also have a virus in your computer, and above all, what most affects the speed of your connection, the operator takes charge of your internet access. Indeed, you can benefit from a contract indicating a theoretical internet speed and the reality may be quite different. The internet speed test will allow you to really know what your connection speed is.