This mod offers the option of a single-use teleport potion or an infinite-use pad. 4 diamonds (+some other materials) are used to craft teleport potions and 4 of those + some other materials makes the pad. Honestly haven't used single teleport potions before; you could contrive such a scenario though: perhaps you're making a minigame and want to require a diamond target to reach before entering another area? The destination coordinates can be set freely. The cost of 2 teleport pads for two-way travel isn't cheap enough to be available in the early game but you will eventually unlock pretty much free travel.
Recommended for teleport hubs on servers at spawn locations to create a hub-and-spoke teleport network. Also recommended if you want to play survival and unlock teleportation eventually, while also keeping a cost to convenience of keeping multiple pads in your network at once.
Not recommended if using multiple dimensions/planets as that might make it too easy to bypass the proper methods for travelling to other locations. If you think teleportation should always have a cost, you could also remove the pads and have only teleport potions in the mod.