We can't count the number of times we've tried to go back to a tab we thought we left open, only to realize everything is now gone. Instead of digging around in 'history' for the link to those shoes that you were totally going to buy, there's a much easier way to restore everything back to normal. Open up your tabs menu by pressing the button in the bottom right corner, then press and hold the '+' button to open recently closed tabs.
If you want to do the reverse, i.e. close all of your tabs at once, there's a way to do this, too. In the same tab view, simply press 'done' and you'll have the option to close everything. It comes in handy if you don't want someone to see what you've been looking at!