You should give staff as much training as they need to do the best they can in their role – it will be worth it.
Consider how frustrating it would be for a customer if a member of your team couldn’t answer their question, couldn’t help with their problem, or didn’t understand something important about your products or services. That customer will be unhappy and they’ll be left with a poor impression of your brand. They’ll probably tell all their friends – then head straight for your competitor.
You can easily avoid this kind of scenario by making sure your staff are better trained and more knowledgeable. Training can be one of the best marketing investments your business could make.