In the left panel click on the layer, which you want to work with.
Click on the icon "Toogle Editing".
Click on the icon "Move Feature".
Now you are able to move the feature with the mouse.
Click on the feature with the left mouse button, press the mouse button down and pull the feature to its desired destination.
On the picture above you can see, that we are moving the feature on the right a little bit down.
When you are finished, you can click on "Toogle Editing", and it will turn off.
Then you are asked, if you want to save your changes.
Click on "Save", if you want to save.
You could also save as you make changes by clicking on the icon "Save Layer Edits".
You are welcome to write comments below. If you have any questions, please post in the forum.