Should I use the Adobe Sign Library?

Hi all, I am new to Adobe Sign and had a few basic questions.

1. I currently use Google Drive to store all my document files, should I use the Library also or transfer all the signed docs to Google Drive? 

2. Is there a difference between a Library Template and Library Document? How should I use the Library if applicable?

3. Is there a time-limit on documents being accessible in Adobe Sign and the Library?

4. Given the above should I use the Archive feature and if so how? How does the Archive differ from the Library?

Thanks

Mark Thimm

Compass Advisors (Malvern)