What does it mean to write a 'sensory' description?

Writing descriptively involves describing a setting, a person, or even an emotion. Writing a description allows you to fully engage your own imagination and that of your reader. Being restricted to the written word when evoking a three-dimensional, multi-sensory environment is a challenge, but, as you know, good authors can do precisely that. The key to writing a good description is to make full use of the English language and to think carefully about choosing exactly the right word for the impression you'd like to convey.