An escalator is a long moving platform that works a bit like an automated treadmill on a slope. This allows you to stand on the escalator and to be gradually taken up to the next floor this way. At the same time because it is sloped it means that you can push a wheel chair or a push chair up it, and they will normally have grip along the tread so that these don’t roll down and cause a danger that way. Speak with your escalators consultants about making your escalators shopping trolley and push chair friendly. In other situations escalators can simply work as stairs that move, but these escalators provide less access for wheel chairs or trolleys. Again escalators consultants can help you to select the best option for you.
This of course takes up a certain amount of space however in your building and this is one important consideration.