Gimbals are excellent devices for photography and video. They are really useful for vlogging and capturing video when you want to move keeping the video steady avoiding camera shake. The gimbal is really a camera stabiliser and you can get models that have built in cameras or cameras you can attach, including smartphones. In the video below I use one that uses my smartphone.
I also like that it has a joystick so can do nice smooth pans and tilts.
The nice thing is that they are light and portable and can easily fold up so that you can put them in your bag. Bigger gimbals that use mirrorless or DSLR cameras are perhaps too big to fit in your bag but that would depend on how big your bag is.
Aside from smoothing out motion as you move it also has some other features such as tracking to keep what you have selected in view but moving the gimbal to try and keep it in shot. You can also do time-lapse.
The model I have has a stand so you can put it on a surface but I can also attached it to a tripod without the stand.
It is useful for photography too as it can keep the camera steady. It will do panoramas and automatically stitch them together, it does it quicker then the built in panorama feature in my iPhone, probably the same for an Android phone too. There is a fun feature that was recently added to the DJI app and that is Clone Me. It does a panorama taking three shots, you have five second between each shot move and appear up to three times in the same shot.
Check out the video below to see what the gimbal can do.
Here are some gimbals:
DJI Osmo Mobile 3 (as seen in this video): https://amzn.to/3ywAx5z
DJI OM 4: https://amzn.to/3mKtrYN
DJI RSC 2 Pro Combo (as seen in this video): https://amzn.to/3yuVjCG
Zhiyun Smooth Q3 Combo: https://amzn.to/3mICSYX