Do i have the correct meaning of ping?

Lets say you send a request for a file. It will take 52ms before the transfer starts. When it does it will remain at 3mbps till complete.

Ping is a problem with games where your sending many small commands. The time adds up as it will take 52ms for each command
 
Ping is how long it takes for information to get somewhere. Bandwidth is how much something you can move.

A low ping would be like walk over and delivering a present to your neighbor. A high ping would be like driving across the country to deliver a present to a family member. High bandwidth would be like driving a semi-truck across country to deliver a lot of presents. It will still take a long time, but you can move a whole lot more.