Most poufs are described as multi-use. The Cube Brava Pouf Ottoman actually is, mostly because of its shape: a flat, stable top instead of a rounded one, which is what makes the side-table use case real instead of aspirational.
As a footrest
At under 5 lb and sized to sit comfortably in front of a sofa or armchair, this is the baseline use, and where the durable water-repellent Oxford fabric earns its keep against day-to-day scuffing.
As extra seating
The flat top holds weight evenly, so it doubles as an extra seat when you have more people over than chairs. It's light enough to move room to room as needed, unlike a second armchair.
As a side table
Add a tray, or anything with a flat base, on top and it becomes a side table for a drink, a book, or a laptop. This only works because of the flat-top shape. A rounded pouf can't do this without whatever you set on it sliding off.
Why it works as one piece instead of three
For a small space, that's one purchase covering three jobs instead of three separate pieces of furniture competing for floor space. It comes in multiple colourways, made in Canada.