Like any browser worth its salt, Opera Classic includes a bookmarking system to quickly access your favorite websites as well as tabs to keep multiple pages open at once. Basically it includes the basic features that are now a given on all modern browsers.
From the Opera Classic settings you can activate and deactivate some interesting options such as automatic image loading (activated by default) or a one-column view. You can also adjust the zoom on pages and activate or deactivate the navigation bar.
Opera Classic is a simple and powerful browser. It doesn't include any unique features, but it's a good web browser for almost any device running almost any version of Android.