EDSM (https://www.edsm.net/) is the Elite:Dangerous Star Map. It keeps track of your progress across the galaxy, but needs to be told where you are by a program like EVA. If you create a free account with EDSM, you will be given an "API Key", which EVA can use to communicate with EDSM.

EVA and EDSM can exchange records about your location, and any notes you take for specific star systems. It has many other fun features, like a public map of where CMDRs are right now, sharing a map of your flights with others, and showing your current ranks.