This stuff doesn't just apply to people born after 2000. It's true of pretty much any modern savvy consumer.
Convenience is essential. If you waste my time I will never come back to you. I have better things to waste my time doing online, such as watching What Does The Fox Say, again, for the sixth time on YouTube.
Price matters, a lot. I can’t emphasise this enough. Millennials are Google natives. We Google everything, and we compare prices of everything. If I can buy the same product on Amazon for £2 cheaper I will, not only because it’s cheaper, but because Amazon haven’t annoyed me, yet.
Worth reading the whole list of points.