It is a major problem in modern gaming and it shows up in Minecraft as well.
There are a few tactics that can be used to address the Minecraft lag. It is important to distinguish between FPS drops and lag before you do this.
FPS (or frames per seconds) drops can cause visual stuttering, regardless of whether players play online or offline. Online lag occurs when players try to perform an action later than normal. This can often be seen when attacking mobs or breaking blocks.
Minecraft lag is caused by factors that slow down or block the program's communication with a server. Even in LAN environments, this can occur when a host's connection is not able to facilitate data transfer between multiple players. This could lead to delays in certain interactions.
Network lag is more common on multiplayer servers without the hardware necessary to correlate the actions of large numbers of players. These issues are less common for players who use hosting services to host their servers, but they can still experience lag.
If a player experiences lag while they aren't hosting the server, it could be because their connection to that server is blocked. This can be addressed in many ways and may improve your situation.
1) Players who are using a wireless connection should move closer to the access point in order to improve their link. You can also use a wired connection to stabilize the connection and increase speed, such as connecting your computer to the access point using an Ethernet cable.
2) You can disable your firewall/antivirus and create an exception for Minecraft to keep your computer's security features working properly. This will prevent slowdowns in data downloads/uploads.
3) Disabling a VPN during gaming may be prudent. These programs can make it difficult to connect with the server depending on how encrypted the VPN is and the settings it has for the machine's IP.
4) Make sure there are no drains on your internet connection. The network may become overloaded if other devices are downloading large files or streaming media. This can lead to slower internet speeds and delays.
5) Some internet service providers may “cap” internet speeds and total usage to a specific number. This is called “throttling”, and players won't likely be able get around it on their own. To circumvent this, they will need to contact their ISP or invest in a VPN.
6) The server might have a poor connection, which could mean that players are experiencing lag simultaneously. This issue will need to addressed by the server administrators. Players can't usually address it if there is server congestion. Players can log off to reduce network strain and help the server.