Facebook ads refer to online advertisements that are created and published on the Facebook platform to be targeted to its users.

1. Advanced Targeting Tools : One of the major advantages of Facebook advertising is its wide range of targeting and retargeting options that allow you to reach your prospective customers. Facebook allows you to advertise to an audience based on location, age, behavior, and interests.

2. Free Analytics : Facebook gives you comprehensive report and analytics on the performance of your ad campaigns. The reports are updated in real time, so you can immediately see what is and isn’t working as soon as your campaigns run.

3. Effective Remarketing Tools : Facebook remarketing is one of the most excellent ways to reach visitors who saw your products or services in the past, who are still in the awareness stage. 

4. Offers Custom Calls to Action : Another great advantage of Facebook advertising is its custom call-to-actions (CTAs) that can help you improve your conversion rates. A call-to-action button enables you to give your potential customer explicit instructions on what exactly you want them to do, such as signing up for a subscription, watching a video, or using an app.

5. Budget Friendly : In comparison to traditional marketing, Facebook advertising is cheaper. You can advertise your product to 1,000 people for $5 to $8 if the campaign is done well. In traditional advertising, you might have to pay up to $50 to show your business to the same amount of people.