That's a archive. If it was advertised as something to install, then there might be something inside which can be installed, but there are different scenarios. It might be the source of a program, bundled with scripts to configure, compile and install it. It might be the compiled program with our without scripts to copy all the individual files to the right dirs. Maybe it contains just a script which fetches all the files online and installs them. It might contain a virtual enviroment and the program, it might contain another archive...