When it comes to Facebook ads, there is no one-size-fits-all answer for how much you should budget. But there are some general rules of thumb that can help you determine how much to spend on your ad campaign. First, consider how much you want to spend on each ad and how many ads you want to run. You also need to take into account your target audience and what you’re hoping to achieve with your campaign. A good starting point is to allocate around 2% of your total marketing budget to Facebook advertising. But if you have a limited budget, start with a smaller amount and increase it slowly over time as you see more success.