ASA (Acrylonitrile Styrene Acrylate) is an increasingly common material among users of 3D FDM/FFF printers thanks to being developed to be an "advanced ABS". Every user knows that the PLA is the most consumed, and that ABS is the most used material in 3D printing to make resistant and functional elements, from simple pieces to pieces that will be subjected to mechanical stress, but both have some disadvantage; ABS is prone to the warping effect when carrying out mostly large pieces, something that is solved with the use of 3D printers with a temperature controlled printing chamber such as the 3NTR A4 (industrial 3D printer). Another problem that presents the ABS is the yellowing or discoloration that originates when being in contact with climatological atmospheres. For example, if you make a decorative piece for your garden with ABS, after a year it's likely that the color and surface appearance have worsened.
Who usually use ABS, using ASA will be an easy task and will obtain pieces more resistant to damage caused by sun and water.