On Facebook, there are many ways to target your audience. As a basic strategy, targeting customer using categories such as age, gender, interests can produce good results, but to get the most out of your campaigns, it is best to build custom audiences that based on which types of users make the most benefits for your company or business. You can upload a list of your customer email addresses to speed up the custom audience building process. Creating custom audience is time consuming and take a lots of effort but once you make profile of your ideal customer you will receive great result.First, a great way to strengthen your overall marketing strategy by using the database to make Facebook a retargeting platform. The Second very effective way is use database and make “lookalike” campaign that targets users with similar profile characteristics to the ones in your database. This campaign attracts new traffic with high conversion potential.