Meeting with a credit counselor does not have any impact on your credit scores. Your NFCC-certified credit counselor cannot add or remove any information on your credit reports, however, they can offer personalized advice on how to improve your credit.
If your counselor pulls your credit reports, this soft pull will not impact your credit scores at all. If you enroll in a debt management plan (DMP), your credit scores will be indirectly impacted. Many clients experience an initial decline in points on a DMP, followed by an average increase of 100+ points gained over their first three years on the plan.