• To add music to videos
• To organize your design and create structure ✅
  
• To upload media from your device

Explanation:
Grids are a foundational tool in design that help organize content and create a structured layout. In Adobe Express, grids are particularly useful when working with multiple images or blocks of content, as they ensure alignment, balance, and consistency. Grids make it easier to arrange elements in a visually appealing and professional manner.