It is challenging to provide an up-to-date and universally agreed-upon list of the top 10 most successful advertising campaigns in a specific year as success is subjective and can vary depending on various factors such as target audience, industry, and region. However, here are 10 notable advertising campaigns from 2021 that garnered attention and achieved success:

1. Apple’s “The Whole Working-From-Home Thing” – Promoting the versatility of Apple products for remote work.
2. Nike’s “You Can’t Stop Sisters” – Empowering women in sports.
3. Coca-Cola’s “Open That Coca-Cola” – Encouraging people to enjoy life’s simple pleasures.
4. McDonald’s “Menu of Famous Orders” – Featuring famous celebrities’ favorite McDonald’s orders.
5. Jeep’s “The Middle” – Inspiring unity and togetherness.
6. Burger King’s “Moldy Whopper” – Highlighting their commitment to removing artificial preservatives from their food.
7. Doritos’ “Flat Matthew” – Starring Matthew McConaughey as a 2D animated character.
8. Amazon’s “Alexa’s Body” – Showcasing the versatility of their voice assistant in different devices.
9. Old Spice’s “Smell Like Your Own Man, Man” – Celebrating individuality and uniqueness.
10. LEGO’s “Rebuild the World” – Encouraging creativity and imagination.

These campaigns have received significant attention and positive responses from audiences, leading to increased brand awareness and sales for their respective companies.