To view a list of keyboard shortcuts for the current Bitbucket context, press ? (question mark) on your keyboard.
Bitbucket comes with keyboard shortcuts you can use to quickly access pages and features. To use these shortcuts, the Bitbucket page must be active in your browser (Firefox, Internet Explorer, Safari, etc.). So, for example, in Firefox to make a page active you click its tab. Once you have an active window you are free to use any of the shortcuts. Most shortcuts are a combination of keys where you press one key and then the next in sequence, such as g then i to go to your inbox. Some shortcuts are a single key press, such as / (forward slash) to put your cursor in the search field.
Don't like keyboard shortcuts? You can disable them on your Account settings page. Just uncheck the box marked Keyboard shortcuts.