Functionally, Asset Pooling will disable your Blocks and Variants instead of Destroying them upon removal. 

Subsequently, it will re-enable and reuse your Blocks and Variants (if they exist within the pool) upon creation.

This will dramatically increase map performance, and your quality of life in general.

However, there are things to be wary of when using Asset Pooling.

The largest thing that I wish to impart to you is this:

You cannot rely on Awake() or Start() functions to initialize your pooled assets, as they will be enabled / disabled and your Awake() / Start() functions will not be called repeatedly.

I recommend you Initialize() and Finalize() your objects (if they contain custom game logic) after addition and before destruction, respectively to avoid unforeseen quirks.

Keep your finger on the pulse, you'll know the way to go.