The columns
Each line gives the test's name, the measured value and its unit, then the reference range. That range depends on your age and sex, and sometimes on the laboratory's method: always compare a value with the range printed on the same report.
The marker
A marker made of an icon and a word shows whether the value is inside or outside the range. The range covers most healthy people: a value just outside it can be found in a healthy person, and a value inside it doesn't rule everything out.
What your doctor does
Your doctor reads the report with your history, your treatments, your previous tests and the clinical examination. That whole picture is what gives the numbers their meaning. Write down your questions and bring your old reports to the appointment.