Promotion budget this year (in thousands). Promotion drives customer Awareness. The more customers that are aware of your product, the more likely they will choose your product. You can think of Promotion as driving all interactions with customers before they begin to actively shop. Awareness decays over time. You lose about 1/3rd each year as customers forget the product. If your product had 60% Awareness last year, this year it would fall to 40% if you spent $0 to promote the product. Promotion efforts are subject to diminishing returns. Your first $1M increases awareness about 22%. The second million adds another 23%, and the third million only another 5%. Here are two examples. Suppose you had 60% Awareness last year. One third will be lost, leaving 40% of customers aware of your product. If you spent $1M, you would end the year with 62%. A $2M budget would yield 85% Awareness, and $3M would yield 89%. Suppose you attained 100% Awareness last year. This will decay by 33% to 67%. Replacing the loss would cost about $1.4M.