There are five main elements to raster data. The first is that the cell size determines the resolution of the data and the cell has both ground and map expression. Second, the grid has an extent, that is rectangular since the grid is made of rows and columns. Also each cell has to be coded with something even if it is outside the area being worked on. Fourth, each cell can only hold one type of data despite the attribute ending half way through the cell.
Raster is easier to work with and do overlays.
It is also capable of rapid retrieval and analysis. It is easier to draw on the screen and on computer devices that display pixels. It also works better with constant variation in the data like elevation. There are two major drawbacks to raster. First, each pixel covers a certain area so numerous pixels are needed which means large files.