Adding images/videos to your post make them visually appealing and more likely to be interacted with by people on social media.
Note: You can add up to 10 images in the post (Twitter has a limit of 4. Only the first 4 images will be posted on Twitter).
The ideal image sizes
As far as the file size is concerned, make sure your images are under 4MB each.
Ideal Video Size
The three most popular video sizes being posted on platforms right now are horizontal (16:9), vertical (9:16), and square (1:1).