The difficult answer is that it varies a lot from user to user. Your bandwidth can be limited by others. Or there is a problem from server side or in its internet connection or ISP.
So you can try some mentioned methods.
1) Connect to a different server if you have that option.
2) Restart your router or modem.
3) Obtain another IP Address.
4) Connect with new VPN provider or use browser extension.
5) Test your signal strength by going closer to the tower. Just check where your signal is better and compare your ping time. If it’s consistently better, you’ll improve your signal buying new antenna.
If you want to reduce latency for online gaming, this article could help you http://www.pcadvisor.co.uk/how-to/game/how-reduce-ping-latency-3609346/