Facebook Ads Library what it is and how it works Facebook marketing plays a vital role in a successful business. With FB advertisements, you can reach a wide audience and boost your brand visibility. The FB Promotions Archive is a useful tool that gives data and ideas for developing engaging ads. Whether you want to learn advertising strategies or obtain inspiration, the FB Ads Library is a wealth of information. Exploring the Facebook Ads Library can help you mold promotions that are both effective and engaging.