Metrics are grouped by a category to help you understand their purpose.
Metrics configuration is described here.
Function specific metrics
The number of linearly-independent paths through a method.
The method size, based on the numbers of operators and operands.
The number of physical lines of code of a method, including blank lines and comments.
The indicator which mean how maintainable the source code is.
The maximum nesting level of control structures within a method.
The number of parameters received by a method.
The approximate number of source code lines in a method, blank lines and comments are not counted.
Class specific metrics
The number of methods of a class.
The number of "functional" public methods divided by the total number of public members.
File specific metrics
The cost of additional rework caused by choosing an easy (limited) solution now instead of using a better approach that would take longer.