There are no definite rules on how much you should spend per ad as each business runs with a different amount of capital available and varying growth goals. For the following example, we will be assuming that your business has $1,000 budgeted for advertising, and the best way to use that amount of money to grow your business will be recommended. To start, each new ad can be tested with an ad spend of$10 per day. You can then duplicate your ad sets to target different niches you think will be relevant for your product. With four ads per ad set and three ad sets for your first campaign, you will be spending \$120 on ads per day. It is recommended that you continue testing for about three days before deciding which ads or ad set you should shut down while scaling the more successful ones.