Bandwidth is an indicator of the amount of data that you can download/upload to your PC during a certain period. Units to measure this amount are bits per second or shortly bps.
Bandwidth depends on the device you use and router, internet provider, etc. However, you should know that the bandwidth, even if said to be rather large, may not be exactly like that if you have several devices connected at the same time.
You can compare a bandwidth with a highway. Driving is fun and fasts while the road is relatively empty. When the number of cars increases you get into a traffic jam. Same like multiple lines solve the traffic problem on the highway, multiple bandwidths may solve the problem with your internet speed.
To test your bandwidth you can do a test speed. Once it is done, compare the results to what your internet provider tells you. If you have no downloads in progress and you have only one device connected to your internet, your results should be quite close to your internet provider’s figures.
However, if you an active downloader, streamer and whatever, or you have many devices connected, you will probably need more bandwidth for a good speed.
Here is what you can do to get more bandwidth:
If all the parameters are fine but the internet is still slow, you should check: