Paid posts: 5 to 18 words
Every Facebook ad needs three types of content: a Headline, Main Text, and a Description.
After analyzing 37,259 Facebook ads, AdEspresso found that ads did best when the copy in each element was clear and concise. According to the data, the ideal length for a:
Headline, the first text people read, is 5 words.
Main Text, the snippet above your image or video, is 14 words.
Description, the text that lives directly below your headline, is 18 words.