You might be thinking, "So what's the big deal about that?" Picture this. You've bookmarked some of your favorite sites to use at work, but then lightening strikes and fries your computer. You hope the tech department can revive the poor machine and at least recover your bookmarks. Sadly, your computer cannot be resuscitated and the funeral will held right after school today. Now you have to hope your memory holds up and you can remember all those websites you had bookmarked. Good luck with that.
Now let's imagine that you have been using Chrome as your browser. You sign in, save your bookmarks and add your apps. Then lightening strikes. But you don't care because even if the tech department can't revive your computer, they will just get you a replacement. You'll open up Chrome, sign yourself in and all your bookmarks and apps will be available to you again. No problem. The other benefit in using Chrome is you can access your bookmarks from any computer or device once you sign in on Chrome.