Lollipop Mod 1.16.5/1.15.2/1.14.4 is a core library modification that provides support and resources for other modifications. Therefore, this is definitely a necessary mod that you should not ignore in the future.
About Lollipop Mod
The author of this mod is Zeroneye- who has created a lot of mods for Minecraft. That is also the reason why this library mod is designed to complete all his mods faster.
In fact, this mod not only supports other mods made by the same creator but also saves resources and time. Obviously, after installing this mod, it becomes a lot easier to change, edit and update mods.
Because it is only a support mod, there are not any effects when you install it separately in the game. It only provides documentation, shared code, and built-in frameworks. Therefore, other mods can run smoothly. Without it, you cannot run other mods.
Lollipop Mod requires you to have Minecraft Forge installed before so you can run it.