Wood briquettes can be burnt in a wood burning stove or in a multi fuel stove. They are good because they will light faster than wood, even if it has been seasoned. They will also give off more heat for longer, creating a more efficient fire that is going to be better for heating a home or a business.
They are also good because they are more environmentally friendly. They are compact and are manufactured to be better for the environment (unless you collect your own firewood, of course).
Briquettes a cheaper to buy than firewood and can be bought in bulk to save you more money. They are smaller and easier to store. If you would also like to use firewood, it is perfectly possible for you to use a combination of firewood and wooden briquettes in your fire. The briquettes will help it to light quicker and keep burning.