TD Bank's campaign 'Own a piece of it' cleverly leverages the recognition of major brands like Nike, Coca Cola, and Apple to promote the concept of fractional share investing. By using cutaway sections of billboards to reveal these logos, the campaign creates a visual metaphor for owning a part of these well-known companies. This strategy not only captures attention but also educates the public on a financial product in a relatable way, making complex financial concepts more accessible.