When you perform free tests with 4Gmark, you participate in a collaborative project to aggregate a base of information for understanding and improving the quality of service.
The 'Speed Test' quickly calculates downlink and uplink network speed (average Bitrate).
The 'Full Test' is a scenario with all protocols (latency, transfer, web) giving full visibility over the quality of the connection environment. It calculates a score which let you compare between them different smartphones, networks or places. Also in the 'Custom Test' section, Customized scenarios of tests are available.
Finally as a bonus, a dashboard that will offer the most current real-time information about your hardware, your location, your cellular and your wifi connection.