For instance, players that find the stronghold can make notes about its coords so they can easily reach it again. Besides quickly teleporting to structures, it can also be used for instantly returning to your death position. This comes in handy for singleplayer worlds and dedicated servers that...
Mushroom biomes, remote villages, temples buried in desert sands, ice spike villages: whatever rare structure or biome that eludes you will elude you no more armed with AMIDST, an external Minecraft tool that's like having a world map and GPS unit rolled