How does average speed relate to the distance covered and the time taken for travel?

When traveling with different speed, it's hard to count the distance because you can't use your maximum or minimum speed. Average speed is more accurate to be used to count the time taken for travel because it is count by averaging the minim and maximum speed.
By determining average speed, you can assume that your speed is constant and multiply it with the traveling time to know the distance covered.

What even is this. where is the question