understanding business online textbook

Economies of scale? I do not understand, please help?
I'm doing a marketing project and must provide details on economies of scale for my business plan. I do not understand what it is, I read the book and looked online and can not not understand. Can you explain with examples? Thank you very much.
production with an average cost per unit. For example, if you own a business and enter into a contract to buy in bulk but you get a discount on materials. Thus, the cost of raw materials to reduce costs.
BCDE Bond Connect Discover Explore Swiss Cheese Business English Come to Florida!

