Good collaboration tools make it easy for anyone to share a file, join a meeting or have a 1:1 chat, co-author a document with a colleague, partner, or customer.
This is a huge improvement over the old-fashioned way of exchanging files over e-mail and piling endless e-mail threads which get out of context.
Collaboration tools have proven to generate quicker turnaround times and greater employee satisfaction than the standard communication methods like phone and e-mail.