Paging is a memory management technique. It involves a clear distinction between the logical memory (as seen by the process) and the physical memory (the actual RAM).
The logical address space of a process is broken into fixed-size blocks called pages.
The physical memory is broken into fixed-size blocks of the same size, called frames.
The operating system maintains a page table for each process to map its pages to the frames in physical memory where they are stored.
Therefore, paging involves breaking physical memory into frames.