Post types
1. Text message
2. Image Post
3. Text post with attached link (Shared)
Link is attached as big image linked to the external URL.
3. Text post with attached link (Attached)
Link is attached as smapp square image linked to the external URL.
Google+
1. Text message
2. Image Post
3. Text post with attached link (Shared)
1. Text message
The maximum text length is 420 characters.
2. Text post with attached link
The maximum text length is 420 characters.
See also:
How to format posts:
How SNAP sets imagesHow to format Facebook post with attached link
All types of posts for Facebook, Google+, XING
All types of Facebook posts
All types of posts to Facebook with video