What did you mean by data representation explain it briefly?

Data is information that is interpreted by a collection (Representation) of explanatory Words or symbols. A simple explanation is a 60mph sign at the side of the road. The figure 60 is the data while the sign embossed with 60 is the representation informing you of that which you need to know. Traffic lights are a representation that tells you by the data of different colours what you you need to know. @ is a representation of the data "at"