Not selecting the most "Correct" primary category, not adding custom services and not employing Services keywords in the description.
I'll take a look if you explain the issue. If it is not a big deal and just a little item then no charge. Usually it something simple (at least what caused it...the solution is sometime much more difficult.)
At a minimum:
Monthly Ranking report for target keywords
Traffic report for month compares to previous month
Google My Business Monthly Report