A: Lag can be caused by many different things. There is a meter to the right called "TPS Meter" Hover over its latest results and verify that the TPS is 15 or above. If it is 15 and above, it is likely not the server causing the lag. Next go to the website SpeedTest.net and click "Start Test" It will give you an upload and download speed. To play on Minecraft with no lag you must have AT LEAST 10mpbs download and 2mbps upload, If you do not have these speeds, it is very likely that this is the cause of your lag. If not, please Ping the server you are trying to connect to and verify that you have a stable connection, otherwise please connect support for help!
IMPORTANT: Also, please note that VindexCraft requires at least 2gb of dedicated ram in order to run smoothly. Here is a tutorial on how to dedicate more ram to MC (don't dedicate too much either) https://www.youtube.com/watch?v=qjUoFAmb4jA