The speed you need depends on what you will use the internet for:
 

Basic browsing

If you only plan to read online newspapers, check Facebook, use online banking, write e-mails, or stream music/radio, the lowest available speed option will be sufficient.
 

Gaming and video streaming

If you plan to play/download online games or stream video, you will need faster internet.
How fast your internet needs to be depends on how many people will be gaming or streaming at the same time.

Here are some examples of how much internet speed is typically used when one device streams video at a given quality level:

Streaming ServiceRecommended Speed in Megabits (Mbps)
Max (Ultra HD 4K)25-50 Mbps
Netflix (Full HD)5 Mbps
Netflix (Ultra HD 4K)15 Mbps
Viaplay (Ultra HD 4K)25-100 Mbps
YouTube (Full HD)5 Mbps
YouTube (4K)20 Mbps