Didot is the name given to a group of typefaces named after the famous French printing family active in the eighteenth and nineteenth centuries. There have been several interpretations of Didot created by notable typeface designers such as Adrian Frutiger and Jonathan Hoefler. In my opinion, Didot might not be the most readable font when used for body copy on the web due to its thin and varying strokes. However on Retina displays, Didot looks great even at smaller sizes.
Font research done for you.