Hey Prachi!

Yes, you can make soup in a slow cooker. Any soup can be prepared in a slow cooker.

All you need is to ensure even cooking. Add each ingredient to the soup at right time make it tastier and prevent common mishaps.  

Soups can be made best in a slow cooker. 

To infuse the herbs, it is good to use a slow cooker. So, all in all, you can use a slow cooker for infusion, soups, and stews also.