[Bud and Monty]

I have noticed on some of the forums that some of you have talked about regeneration and power loss and whatnot. And when to know you are in regeneration. I am not familiar with this phrase. Can anyone explain to me just what is regeneration and is this something bad or good and will we all experience it? Have owned a Dodge cummins in the past never heard of it with them .Getting the new Ford F350 soon.And curious as to what regeneration actually is, and how I am going to know Im in it. And is this something that only happens during breakin or periodically? Thanks in advance