The definition of an inventory is 'a detailed list of all the things in a place' -- and it can be a real hassle to make them!
But the time you spend on making those lists of chemicals, plasmids, antibodies, inhibitors etc in the lab comes back to you multiplied! It makes lab life so much easier when you know exactly what you have and where to find it.
And importantly, it greatly reduces the risk of materials and reagents hiding somewhere and ending up expired and wasted. And that's great news for the planet!
What´s not to like?