While publishing the Facebook Business page or Group page, here are the requirements to follow:
You can create an image using content AI or upload it from the media library.
Content AI
Describe the image you want to post, and AI will give you samples you can choose from. Click "Try an example" to better understand how the AI works.
Select the number of variations you want your selected image style to have.
Once you click on the image style you want, click the "Generate" button to direct you to the Image style variable you already selected. Choose the variable you like and click the "Continue" button to upload it.
Upload from the media library
Images and videos can help with social engagement towards your business.
The images should be in JPG or PNG format
The picture's size must be between 10 KB to 5MB
The minimum image resolution should be 250x250.
The photo should be related to the product.
Choose Video: Facebook allows you to add videos to your list, representing the product to people and how it looks. They have requirements for videos.
The video should be in MPEG or MP4 format
The video should be related to the product.
Please Note: Facebook posts can't include different media types in one post. Select the media type you want to use (either image, GIF, or video) or switch to an Instagram account that allows it.
Content
You have unlimited content words unless other social posts when posting your content.
Use Bold, italics, emoji, hashtags, and custom values.