First you need to create a Samsung distributor certificate. You can find the procedure in the link
Creating Certificates | Samsung Developer
The DUID of the device in which you are going to install your app must be given while creating the distributor certificate.
After creating the certificate set it as active.
Go to tizen studio, and right click on the root of the project which contains config.xml and select “Build signed package” . Now signed .wgt is generated inside your project
And create sssp_config.xml file which contains your wgt name and size in bytes. You can find sample sssp_config.xml on online.
The size mentioned is the size of your wgt in bytes
Host these wgt and sssp_config in same folder
like https://s3or whateverurl/tizen
Inside the tizen both files must be there.
enter the url https://s3or whateverurl/tizen in url launcher
Your app will be installed