1. A description paragraph is required when you are asked to write about how something looks, sounds, smells, tastes or feels. You should provide specific details of the most important features and use appropriate adjectives to describe attributes and qualities.
2. The ambiance conveyed in the room is peaceful, calm, tidy and well-organized.
3. Sensory details include sight, sound, touch, smell, and taste. Writers employ the five senses to engage a reader's interest. ... When sensory details are used, your readers can personally experience whatever you're trying to describe, reminding them of their own experiences, giving your writing a universal feel.
I hope it helps