Here's a bit more detail:

* Best viewing time: Cassiopeia is most easily seen in the evenings during autumn and winter in the northern hemisphere. It's a circumpolar constellation, meaning it never sets below the horizon for observers at high northern latitudes.

* Location in the sky: It's located in the north of the sky, roughly opposite the Great Bear (Ursa Major).

* Shape: It's easily recognizable by its "W" or "M" shape, depending on the time of night and the observer's location.

If you're unsure where to look, using a stargazing app like Stellarium or SkySafari can be helpful.