What is the functional strategy of the facebook ( Marketing or financial strategy )

i don't know if the functional strategy mean the marketing or financial any helps plz

Co marketing is a strategy where a company joins forces with another company and develops a marketing plan together. Small businesses can do this as well as larger ones.

A marketing plan is a plan of action for a company to market it's service and products. A marketing plan will include a summary of objectives and goals, situational analysis, and other vital statistical information to make a case and display company weaknesses and strengths in a market.
A marketing plan is a strategy that is developed by a business to help promote them, their product or their services.

Marketing strategy means an organization's strategy that combines all of its marketing goals into one comprehensive plan. A good marketing strategy should be drawn from market research and focus on the right product mix in order to achieve the maximum profit potential and sustain the business. The marketing strategy is the foundation of a marketing plan.

Refer to link below for more details