The document discusses the Cost of Customer Acquisition (CoCA) metric which measures the expenses associated with acquiring new customers such as salaries, marketing costs, online advertising, social media, and SEO. It recommends defining a marketing plan, budgeting for marketing and sales, calculating the CoCA, revising CoCA and customer lifetime value calculations, reviewing whether changes should be made to the business model, and revising the business model and creating a cash flow statement within the next week.