The given compound

is an example of:

In the structure ${\text{CH}}_2=\text{CH}-{\text{CH}}_2-\text{Cl}$, the Chlorine atom is attached to an $s{p}^3$ hybridised carbon atom which is adjacent to a carbon-carbon double bond. This structural unit is called an Allylic position. Therefore, it is an Allylic halide.