WHAT is a DART in a pattern drafting?

Dear Sewing Friends, in this video video I would love to talk about darts. Now, there is a ton of information to dive into about and around darts - but today, let's start simple and talk about the SIMPLEST way of understanding what is a dart and where it actually comes from? I hope that this video tutorial/explanation makes it a bit clearer for you in terms of why we need darts (or don't) and how are they formed. All mentioned links will be below: Fitted bodice block - https://www.youtube.com/watch?v=aJ6Stv9b8k0 Cami with darts - https://www.youtube.com/watch?v=ixil6UyKhTc&t=76s Boxy Top - https://www.youtube.com/watch?v=DclGmbztwlw&t=21s Peasant Blouse (gathered neckline) - https://www.youtube.com/watch?v=qK-DjBS0HdY&t=406s The shirt I am wearing - https://www.youtube.com/watch?v=CxYGp5P45Uk&t=153s Colorblock dress - so sorrry! I haven't had a chance to make a tutorial for it ABOUT THE BOOK: Author: Lucia Mors De Castro Title: Patternmaking in fashion. Step by Step. My thoughts: The book is quite interesting and provides good information about pattern making process as well as different techniques. It goes over the creation of basic patterns for pencil skirt block, dress block and sleeve, as well as a few other interesting pattern modifications. While there definately is value in this book and I am happy I got it, if you are a beginner at patternmaking - you might find this book difficult to follow as it is not written in a beginner friendly way. HOW TO JOIN this ch