Question

The photo-sharing site Instagram owed a good deal of its success to filters. What are filters?

Answer 1

They are ready-made effects for your photos. Just took the test

Answer 2

Adding a filter to a picture can change the whole effect of the picture. Say you wanted a more vintage theme for your picture, you could use a black and white theme to give it an old timey feel. Different filters can add effects to the picture, maybe the filter gives your picture a blueish cool toned tint, or maybe it adds more light to the filter.