Well, actually PING is a signal which is sent to the host which requests a response and has 2 main roles i.e to check whether the person initiating the online match-making i.e the room host, in this case, its their servers and to check how long will it take to receive the response. Well the good PING time should be less than or equal to 30 or PINGs generally less than 60 is considered to be best for PUBG or any online gaming. But more than that, its really hard for online gaming.
To reduce it, try to change your ISP, move closer to the internet source i.e Wi-Fi Router, Modem, Friend’s Mobile Hotspot, etc.,. If all else fails, try to change your ISP as I said before or simply you move from your place to a place where you get less PINGs.
Work Hard. Play Harder.