You enter the server and port you want your device to connect with and the login information. Then you choose whether you want to use a SOCKS proxy or not, and finally which apps you want using the tunnel (or, if your phone is rooted, you can choose to make the tunnel system-wide).
Code word (figure of speech) A code word is a word or a phrase designed to convey a predetermined meaning to a receptive audience, while remaining inconspicuous to the uninitiated. For example, a public address system may be used to make an announcement asking for Inspector Sands to attend a particular area, which staff will recognise as a code word for an fire or bomb threat, and the general public will ignore.
In recent years (read: post-Hour of Code, circa 2013) the term coding has resurfaced as a much more playful and non-intimidating description of programming for beginners. On an informal level, it is used to convey the beginning steps of programming, or programming with a tool intended for beginners, such as Code Studio, Scratch, or App Inventor 2.