There are two main types of setting: backdrop and integral.
Backdrop settings are not terribly important to the story. The scene utilizing a backdrop setting could take place almost anywhere without changing the general dynamic or meaning. They are often transition scenes where minimal information is exchange or some detail or piece of information is revealed to the reader.
These are settings like hallways, cafes, sidewalks, etc. The allow for quick entry and exit and are often familiar settings to the reader, so they need minimal description or attention. Not having to spend page space on setting description or explanation allows the focus to stay on the content of the scene.
Integral settings are settings where time and place influence the theme, character, and action of a story in some way. Animal Farm wouldn’t be the same if set in a shoe store. The way the setting influences a scene should be somewhat obvious, in the sense that the characters being in the scene feels right to the reader and the details of the setting help the reader more fully experience whatever is happening.
These types of settings need more in-depth description and development. Take the time to point out important details that bring the scene to life, such as the cleanliness of the room, how dim or bright it is, does it feel oppressive or free, colors that reflect personality, etc. Don’t describe every detail, but do point out those that help the reader get to know the character better or interpret what is happening or what information is being given more fully.
Integral settings are usually recurring settings or settings used for important scenes in the story. When these settings are first introduced there will often be more detail and focus on how the setting affects the character or mood. This type of detail isn’t necessary every time the characters visit the setting, however. In repeat scenes, only mention details that have changed, ones you think the reader may need a reminder of because they will play an important role in some way, or those that a character may have missed or missed the significance of before.
Description of settings should most often be kept at a minimum. Give enough detail that you feel confident that reader can form a basic mental image and let them fill in the blanks based on their own experiences. Trying to hard to force the reader to create an exact mental picture of a setting is exhausting for the reader.
Remember to evaluate what type of scene you’re working with before adding description and details.