Bing Maps "click-zoom" lets you quickly and precisely zoom and center the map exactly where you want it by clicking and dragging a rectangle around your desired view. "To allow all Bing Maps users equal access to the click-zoom functionality, and keep our keyboard shortcuts consistent across all browsers, we've recently changed the key combination required to SHIFT and click," revealed Bing team.
For e.g.: say you're looking at a zoomed out view of the San Francisco Bay Area, and you want to quickly zoom in to downtown San Francisco. The fastest way to do so is to press and hold the SHIFT key on your keyboard, and then left click with your mouse and drag a rectangle around the area you want to zoom to.
As soon as you release your mouse, you're now looking at exactly what you selected. Compare that to 5 clicks of the zoom-in button (in this example), and you can see this is quite a timesaver!
Also, you could quickly zoom by right-clicking anywhere on the map? The right-click menu (accessible via your right mouse button, or Control + click on a Mac) contains options that make it easy to get directions to/from a specific point, add a custom pushpin (which can be saved to "My places"), zoom to either region or city level, and finally, center the map on the selected point.