1.Please enter at least 3 characters

2.Please enter entry text from 100 characters

3.Please enter at least one tag word, min 3 alphanumeric characters.


The above are 3 errors prompts are from "Post New Blog" on unity.
im not really so sharp to understand what the 2.Error really means to describe?
maybe some one help me.
I suggest to make it as simple as it can be to be understood by everyone around the world.