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.
Coding is a specific form of data entry that requires clerks or specialists to enter data according to predetermined codes. For example, insurance claims departments and medical facilities use specific codes to report patient diagnoses, treatments and medications.