When can I use the word "boom"? Can I use this only when something shows growth for a short amount of time?
"Boom" has several different meanings and all are used a little differently. One meaning is the one that you asked about; showing the growth of something for a short amount of time, like it was used in this video. Ex: The economy is booming. Ex: The store boomed in sales due to new products. Another definition of "boom" is to make a very loud and deep sound that can be heard from a distance. Ex: The thunder boomed in the sky. Ex: Their voices boomed throughout the room. "Boom" can also be interjected into a sentence to show the suddenness of something. Ex: I was walking down the street then boom! A car hit a stop sign. Ex: We were both in the store and boom, just like that she was gone.