Follow the 20% Text Rule in Images
If you plan to boost a post or place an ad, make sure the image doesn’t contain too much text. Remember that boosted posts must follow the same rules as Facebook ads: neither can use heavy in-image text. If the image you want to use contains text, use the Text Overlay tool to check it.
In the following example, the tool warns that the uploaded image contains too much text, which will limit the post’s reach. As a result, the promoted post might perform poorly. Sometimes, Facebook doesn’t approve the ad at all because an image has too much text.
Jay & Julia Taylor own and operate Caney Creek Studio. Caney Creek Studio is a video production, digital marketing, and social media management agency.