Nowadays, the internet is full of acronyms and abbreviations, and, if you get yourself trapped in the mess with the meaning of these abbreviations, you are simply not alone. There are many people out there who use acronyms and abbreviations more than sentences. So, if you are new to this...
You do not have to worry about grammar when using these acronyms—they can be placed anywhere in a sentence. Always make sure you know the meaning behind an acronym before using it.