1) Facebook
- Maximum post length: 63,206 characters
- Ideal length of a status update: 40 characters
- Ideal length of a video: 30-45 seconds
2) Twitter
- Maximum length of a Tweet: 140 characters
- Comment plus Retweet: 116 characters
- Link in a Tweet: requires 24 characters (116 for own text)
- Image/GIF/video in a Tweet: requires 25 characters (115 for own text)
- Link + image/GIF/video in a Tweet: requires 47 characters (93 for own text)
- Ideal length of a Tweet: 100 characters without link; 120 characters with link
- Ideal length of a hashtag: not more than 11 characters (preferably shorter), only use 1-2 hashtags per Tweet
- Length of video: 30 seconds
3) LinkedIn
- Profile slogan: not more than 120 characters
- Summary: not more than 2,000 characters
- Job specification: not more than 100 characters
- Status update: 600 characters
4) Instagram
- Profile description: not more than 150 characters
- Image description: not more than 2,200 characters, only the first three lines are visible in the feed
