Compress images before uploading
Resize images to the needed dimensions
Convert files to more efficient formats
Remove unnecessary metadata
Delete unused pages, layers, or elements
Lower image quality slightly if acceptable
Use file compression tools
Optimize PDFs before saving
Reduce audio bitrate when possible
Reduce video resolution or bitrate
Remove duplicate content
Flatten complex layers
Crop unnecessary whitespace
Use vector graphics instead of raster images when possible
Split large files into smaller parts if needed