Why have some Facebook publications become big letters

Recently, all Facebook users have noticed that some publications appearing on Facebook are in uppercase letters, others in lowercase letters (recognized on Facebook).

Everybody started wondering why these big letters in some publications and how you can write on Facebook in uppercase letters?
I decided to write this article in order to answer your enquiries and explain why.

By searching this topic you have reached the following results, the Facebook publications that have a capitalization of no more than 35 characters appear in uppercase letters, and publications with a capitalization of more than 35 characters appear in lowercase letters.

Publications that contain pictures or videos are always in lowercase letters even if the number of letters of publication exceeds 35 characters.

Why did Facebook make this change?
The reason is to encourage Facebook users to participate, albeit with few words and letters, and that their publications will be prominent, encouraging them to publish more posts.