i know that you could organize your files according to this structure in svn:

trunk branches tags

that you copy the trunk to a folder in branches if you want to have a seperate development line. later on you merge this branch back to trunk.

but i wonder why me and my group should do this. why should one copy the trunk to a branch and work with this copy just to merge it back to the trunk, and mean while the code is frequently updated/commited to stay in sync with the trunk. why not just work with the trunk then?

what is the benefits with creating a branch?

would be great if someone could shed a light on this topic.

thanks in advance