League of Legends is a MOBA that solely relies on your internet connection. Just like any other server on the internet, the game can suffer from connection failures and issues. If you suddenly are suffering from packet loss, have high ping, or cannot log in to the client properly. You can now use the official Riot website alongside other third-party independent tools to get an idea of the matter at hand.
League is known to have some trouble, especially when the game is updated and on the weekends. Therefore, it makes sense that the developers have amped up their server maintenance speeds and are improving their server status page simultaneously.