Globs are a partially amorphous life-form of the shape-changing kind. It is not a single-celled organism, as one might think. It is rather composed out of smaller groups of cells, specialised for their purposes, like feeding, movement or neural, but the little glob is practically identical with any other within the big glob, which is composed of thousands and more.
The little glob can theoretically survive alone, but more globs offer more options. Communication via the neurons can organize it, and construct a body fitting its enviroment, and move towards better food or defend from enemies. When the number is high enough, signs of intelligent behaviour start to show up, and sufficient size and time can make a glob truly intelligent.
An old glob could learn to communicate with humanoids, can slowly shape-change into any form, is practically immortal, and wounded by few things.
So why don’t these creatures rule the world by now?
Little globs are ill suited for survival. Big globs have not the advantage of numerous inborn instincts basically any creature has, from little insects, through animals, up to humans. It must learn everything necessary and anew as it grows. If you loose a hand, it is terrible, but you are still the same being. A glob that has a part cut off looses a part of its memory. If it is not attached fast, some of the memories are lost as the part becomes alive in itself. Smarter blobs learn to relocate globs with important memories inside, and are not so willing to change their shape wildly.
Globs are a fleshy substance, they cannot create a skeleton, hide, nails or horns. They gladly use tools for work and protection, when they learn to use them.
As for reproduction, big globs can in theory split in two at any time, but it takes a very intelligent glob and long planning to make the offspring similarly smart, a random split is likely to produce two chaotic insects, with the critical memories disconnected. A little glob is a group of cells, and reproduces as they do.
The primary sense is sight, hearing and smell is much weaker. All little globs have seeing cells, granting the big glob a complete 360 degree view, but a very shortsighted. Globs do not wear clothes, by the way. Some globs learn in time to evolve good ears, some even a voice.
As for personality, globs have no genes for it, and are so a pure chance-creation, the random product of trial and error of survival.
Globs rest often, but never sleep.