Subway is one of the largest quick service restaurant chains in the world, with over 44,000 locations in more than 100 countries. The brand has implemented a variety of marketing strategies over the years to reach its target audience and maintain its position as a leading player in the fast food industry.

1. Advertising: Subway heavily invests in advertising, using a mix of traditional and digital media channels such as television, radio, print, and online advertising. The brand often runs promotions and discounts to attract customers and drive sales.

2. Sponsorship: Subway has been a long-time sponsor of sporting events, such as the Olympic Games, as well as individual athletes, such as Michael Phelps and Ryan Howard. This allows the brand to reach a wider audience and create positive associations with fitness and wellness.

3. Social Media: Subway has a strong presence on social media platforms such as Facebook, Twitter, and Instagram. The brand uses these channels to connect with customers, share promotions, and run contests and giveaways.

4. In-store Promotions: Subway often uses in-store promotions and events, such as sampling stations and special menu items, to drive traffic and increase sales.

5. Community Involvement: Subway is committed to giving back to local communities, through initiatives such as Subway Fresh Forward, which helps franchisees remodel their stores and increase profitability, and Subway Cares, which supports organizations such as the American Heart Association and the Leukemia & Lymphoma Society.

Overall, Subway's marketing strategy focuses on promoting the brand as a healthy and affordable fast food option, building strong relationships with customers, and continuously improving the customer experience.