The Web is a big place, and though it can be fun to surf the Web to find what you're looking for, sometimes it's easier to have an app do it for you. StumbleUpon is a popular website that now has an Android app so you can find not only websites but also photos, videos, and news based on the interest(s) you select. You can create your own StumbleUpon account or you can log in to the app using your Facebook account.
You can share the content you find through e-mail, on social networking websites, and/or to fellow StumbleUpon users. As you use StumbleUpon, the app will refine its searches to give you more accurate results.
And unlike the website, the StumbleUpon app also contains the App Discovery feature so you can find other Android apps that may be of interest to you.