Image stabilization (IS) is a family of techniques that reduce blurring associated with the motion of a camera or other imaging device during exposure. Generally, it compensates for pan and tilt (angular movement, equivalent to yaw and pitch) of the imaging device, though electronic image stabilization can also compensate for rotation. It is used in image-stabilized binoculars, still and video cameras, astronomical telescopes, and also smartphones, mainly the high-end. With still cameras, camera shake is a particular problem at slow shutter speeds or with long focal length (telephoto or zoom) lenses. With video cameras, camera shake causes visible frame-to-frame jitter in the recorded video. In astronomy, the problem of lens-shake is amplified by variation in the atmosphere, which changes the apparent positions of objects over time.
Most starting photographers buy the cheaper lenses since those are what they can afford; however, the are mid-range lenses which have this feature. You don’t have to sink thousands of dollars, just a bit more than the cheap lenses.
Here is an example, say you are looking for 70-200:
You could pay $2,449.99 CAD for EF 70-200 f/2.8L IS III
Alternatively, if you go with a bit less Depth of Field you could pay $749.99 CAD for EF 70-200mm f/4L USM
Mid range lens sells for $549.00 CAD for a EF 70-300mm f/4.5 IS II USM
At a $200 difference, if you can afford the difference go with the 70-200 L.
Finally, if you have a “cropped sensor” (EF-S Mount) you can buy a non-stabilized lens EF-S 55-250mm f/4-5.6 IS STM.