The guideline in question pertains to the amount of text that could be included in images used for Facebook advertisements. The principle suggested that images should not contain more than a certain percentage of text. For example, if an image contained a logo and promotional messaging, the combined area of the logo and text should ideally remain under the specified threshold.
This approach was implemented to ensure users’ feeds were visually engaging and not overwhelmed with advertisements that were primarily text-based. By limiting the text area, the platform aimed to improve the user experience, leading to higher engagement rates. Historically, a higher text density could result in reduced ad delivery, or increased costs per impression, discouraging advertisers from overloading images with excessive text.