Three types of speed
instantaneous, constant, and average speed
Instantaneous Speed
the speed that an object is going at that particular moment
The Photo above is a example of instantaneous speed
Constant speed
speed is not increasing or decreasing but remain consistent over time. It means that velocity is zero.
Above is a picture showing an example of constant speed, setting your cruise control is another example of constant speed
Average speed
The average speed of an object tells you the (average) rate at which it covers distance