Inspection:
If something is discovered during the inspection process, it will be presented to you, the homeowner. It may be a lint blockage, incorrect dryer exhaust cap, rodent or bird nests, faulty or incorrect dryer exhaust pipe, leaks, etc. A repair may be recommended for some items.
Repair:
A dryer vent repair could be something as little as untaped seams of your dryer vent. It could also be a crushed pipe somewhere in your system. Whatever it may be, it might collect lint, create moisture, create blockages, or it may be leaking CO2 into your home.