The importance of a logo pack

I've just written an article on Medium about logo packs and how to explain their importance to a client:

http://t.co/sxsnSBUlqr

It includes an email I send to clients which explains what the various file types and colour spaces are for and why they are important.

If you like it, feel free to use it for your own correspondence. If you think it could be improved I'd love to hear your suggestions.