The Dynmap plugin essentially allows users to create a map that they can view on a webpage. It's 100% safe and has been verified by many users such as some of the popular SMP servers.
For more information on how to obtain the plugin, please go here. [THIS IS NOT AN ADVERTISEMENT, JUST AN INFORMATIVE VIDEO]
https://www.youtube.com/watch?v=iYUmEZQ0Hmo&ab_channel=Vesec