Here are some key points to remember about wave speed:

* It's different from the speed of individual particles in the medium: Waves transport energy, not matter. While particles in the medium might oscillate or move, they don't travel the same distance as the wave itself.

* It depends on the medium: The speed of a wave is determined by the properties of the medium it travels through. For example, sound travels faster in solids than in liquids or gases.

* It can be calculated: For many types of waves, wave speed can be calculated using formulas that involve the wavelength (distance between two crests or troughs) and the frequency (number of waves passing a point per second).

Let me know if you'd like more details about wave speed for a specific type of wave, like sound waves or light waves!