Canva

Pros
 Cons
Client has easy access to edit in the future 
Not the best for text-heavy designs/documents 
 
More limitations than a professional design program, but still capable of producing excellent layouts

Adobe Illustrator

Pros
 Cons
The most outstanding layouts and designs
Must have the Adobe Illustrator software program or Creative Suite to edit

Google Docs

Pros
 Cons
Easiest to work with for text-heavy documents
Designs are limited; mostly just a header and footer
Easiest for a client to edit