What is an 'exclusive' deal?

What is an 'exclusive' deal?

Jonny Geller (Managing Director - Curtis Brown (Books)) gives expert video advice on: How do advances and royalties work?; Should I accept an offer of a 'flat fee'? and more...

All publishing deals are exclusive to the publisher you're selling to. The question is what territories do they have and do they have an exclusive right to publish your book in these territories and no one else can publish into them? That is an exclusive publishing deal.