Firstly, In-House training is important to train your employees within your business. In-house training can act as refresher courses or in-depth academic training for new skills. Most importantly, in-house training is always beneficial. The Business Dictionary identifies that training is great because it gives a chance to develop interpersonal skills and helps to bond teams together to become a motivated workforce.
https://www.theccm.co.uk/in-house-training/