If you’re running Solus 3 and above, you don’t need to do anything. Snap is already installed and ready to go.
On older versions of Solus, snap can be installed from the command line. Launch the terminal from the System Tools menu and enter the following:
sudo eopkg up
sudo eopkg install snapd
Additionally, enable and activate both the snapd socket and the snapd.apparmo services with the following commands:
sudo systemctl enable --now snapd.socket
sudo systemctl enable --now snapd.apparmor.service
Either log out and back in again, or restart your system, to ensure snap’s paths are updated correctly.