It allows to export one or sevaral layers from the current project, and generate a shape format file (.shp) for each layer.
1. Click on the option Export Layers, the following window will come up:
2. Select the layers that you want to export and click on Accept.
3. A window will appear and you need to define the destination folder for the exported layers. The layers will be exported in shape format file (.shp); therefore, 4 different files will be generated for each layer.
The .dbf file contains data associated to the layer objects. The .shp file contains the vectors that shape the objects (including georeferenced information), and the .shx file is an index that links the other two files.