A lactate test can give you another way to set training targets. Its value comes from how you use the results, rather than from collecting a report.
What to ask for
A clear explanation of your results.
Training zones with units and labels.
Advice about the sport you train in.
A way to ask questions after the test.
Turn the report into a useful change
Check your settings against the report. Then review the targets in your plan with your coach or tester. Keep the changes manageable so you can see what is helping.
See progress over time
Compare similar sessions as well as test results. Note the conditions, the pace or power, and how you felt. A test result is one part of that record, not a guarantee of faster racing.