what are the conditions in which we get NoReverseMatch error

what are the conditions in which we get NoReverseMatch error:

i get this error many times in my project. I want to know why and how this error is raised and how to solve this problems.

It’s caused by trying to reverse a url name that isn’t defined. It’s typically thrown by a call to reverse or reverse_lazy. It’s resolved by ensuring all calls to reverse reference a name defined for a url.