How to create a desktop launcher on Ubuntu
ubuntu howto launcher desktop dockReading time: 1 minute, 0 seconds

When you download a new application from the web, you don't have a launcher automaticaly. For instance, you want download the last version of Cura for 3D printing. The downloaded file is a AppImage.
You can directly run this file if you're setting his rights:
chmod a+x Ultimaker_Cura-4.6.1.App...