If your laptop or monitor only has a VGA connector, use a VGA cable converter to still use common HDMI, DisplayPort, or DVI connectors. This way, you can easily connect a screen on location. You can take the converter with you in your bag and connect your laptop to the screen via the converter. For example, you can use screens and projectors that have a VGA connector anywhere, while your laptop has an HDMI port, for example.