If you have declared that your bike will be garaged, your insurer has accepted your insurance on condition that your motorcycle is kept in a locked and secured garage.
Depending on your policy and who you're insured with, if there is a garaging clause on your policy then this applies to the designated garaging or home address and possibly the surrounding area (for example, if the garage is not on your property).
You can find out more on your policy documents, or contact us.