It is very important to keep the chain tight because it can wear out very quickly if it is too loose. This will cause the tool to make a lot of noise and can make it very difficult to work with.
When chain gets too loose, the bar will hit it and this will make a lot of noise. The chain will also come off very easily when it is too loose. This can lead to some serious problems while you are working.
By making sure that the chain is always properly adjusted, you will save yourself a lot of trouble. This means that you can work efficiently and effectively.