When should I shoot in RAW?

RAW image format retains the maximum amount of detail about the captured scene. It makes no automatic image adjustments. This results in greater dynamic range and smoother gradients from light to dark regions in your images.

The RAW image format lets you make important changes to properties long after the photo is taken. For example, exposure, contrast, color saturation, sharpness, and white balance.

The main downside to shooting RAW images is that the image file sizes are much larger. They can be anything between two and six times the size of the equivalent JPEG images. This means you’ll run out of space on your memory cards quicker, and it requires your camera to be capable of saving such large files quickly, so it’s ready to take the next shot.

Luckily, memory cards are relatively cheap now and getting cheaper. So, unless you’re shooting thousands of images a day, and quality isn’t a big issue, you should always shoot RAW.

Refer to this article for more details on shooting in RAW format:
RAW vs JPEG: Which Should You Be Using?