This is a "deluxe half step with rubber mat." The idea is that it helps with a scenario like the following. Suppose you have a big step up from outside to your front door, and it's starting to become difficult for you as life goes on. You could put this half-step in front of it and then you can get in and out of your house more easily. We were trying to use it where we needed a small stool with just a little height, but it wasn't really practical for that.

Product description:
https://www.mobilitysmart.co.uk/deluxe-half-step-with-rubber-mat

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Half step (Jericho OX2)