Probably the best thing about stepping up from a compact digital camera to a digital interchangeable lens camera is that you now have an entire world of digital camera accessories to choose from. Some of the accessories may be for convenience while others offer performance enhancement. How about a digital camera accessory that is both?
A vertical extension grip is a digital camera accessory that provides an additional hand grip and attaches to the bottom of a DSLR. That's right; it makes the camera even bigger. But that's not all because the grip can hold not only one but two camera batteries. You can also buy a camera hand grip via https://gariz.com.au/ for the safety of your camera.
With the grip accessory attached the photographer immediately notices that the grip provides a second shutter button. Now when the camera is shot in a vertical orientation (portrait) there is a shutter button placed exactly where the right forefinger falls. There isn't a need any longer to break the wrist and reach over the top of the camera to shoot in a vertical orientation. The wrist stays straight creating more stable support and with far less stress and fatigue caused by an uncomfortable hand grip.
Basically, a vertical grip allows a photographer to operate the camera in vertical (portrait) orientation while holding the camera in a natural and more stable manner. If you've ever shot more than a dozen portrait images in a row without an extension grip I think you can appreciate this change in how you hold the camera would give you relief.