Why is my wifi link speed is so slow?

iv'e been trying to download on Google play store, and i cant download anything. I tried to look at my wifi connection and i see that the link speed is 0 mbp/s not even 1 mbp/s, I tried to download from my other device and it's working properly,the link speed is on 54 mbp/s .

Does anyone know what the problem is, and how to fix it?