We all use different other apps for chatting purpose like Messenger, Whatsapp, etc. Presently, most people do not use G-talk features. However, Gmail is handy to us, at least concerning primary e-mail checking. Hence, the Gmail app is necessary, and its miniature version is the Gmail Go.
The Gmail Go application utilizes around 30 megabytes of space on the phone. Compare that with your regular Gmail app which takes approximately 300 MB of space. Gmail Go offers the same features as the standard Gmail app would do. Gmail Go is the ideal for devices that run on low-end Android OS.