Suggestions for designing a app

I have been assigned to building an emailer and dashboard for that will allow users to send text and emails to their customers that will gather social media reviews. The goal is to have a way for the users to respond to bad reviews before they are actually posted.

The dashboard is pretty straight forward and texting is probably beyond the scope of this forum.

I would guess a standard get url like
www.somedomain.com?customerid=x&stars=5 
www.somedomain?customerid=x&stars=4  
on each star link to intercept the customers intention


Anybody done anything similar and can give me some pointers or ideas where I might improve on the apps design.

Please also let me know if it is ok to ask this question since it is more general and regarding a certain project. I have specific questions that I figured I will probably become apparent as I dive in the code.