A bad website is like a grumpy salesperson.

Popularity is the product of two factors: (a) how compelling material you offer, and (b) how easy it is to access it. Host free pirated movies and users will flock to the site, even if it's difficult to use.

On the Web, all advantages are temporary, and you must keep innovating to stay ahead

Developing fewer features allows you to conserve development resources and spend more time refining those features that users really need. Fewer features mean fewer things to confuse users, less risk of user errors, less description and documentation, and therefore simpler Help content. Removing any one feature automatically increases the usability of the remaining ones.

In the attention economy, anyone trying to connect with an audience must treat the user's time as the ultimate resource.

...the book is a manifesto to make the Web atone for the sins of computers and regain a level of simplicity that can put humanity at peace with its tools once again.

Users spend most of their time on other sites. This means that users prefer your site to work the same way as all the other sites they already know.