You have a model that has more than 1 texture and material UV-mapped on it. Or maybe there’s a lot of materials and textures. So now you want to combine them all into 1 where you can easily add or remove details from the materials. Usually you’d have to use Image Editor software to put all those materials together and then add it to Blender.
With Super Easy Bake the hassle of putting everything together is solved, as it combines all materials from the targeted object into 1 material that you can easily export as an image and edit if you want to. Or you can just directly UV map on it without any modifications.
One of the best functions this has is the ability for you to export procedural textures or texture combinations derived from node groups and alterations, something which is just not available in default Blender. By being able to export procedural textures like that you can easily transfer that data anywhere. This is impossible without this addon.
Also, you can Merge Objects by exporting multiple objects’ UV maps into 1 material. Such can be useful if you want to export in bulk for your Image Editor or other needs.