It's a simple and common phrase used to express approval or agreement.
Here are some examples of how it might be used:
* "O dim ka m rie nri a." (It's good that I eat this food.)
* "O dim ka m hụ gị." (It's good to see you.)
* "O dim ka m nweta akwụkwọ ahụ." (It's good that I got that book.)