1. Go to Ad creation.
2. Select your objective and click Continue. View supported objectives.
• If you selected the App Install, Reach, Brand Awareness or a Catalogue Sales objective, you can skip to step #4.
3. Complete the Destination section if you selected a Traffic, Conversion or Messages objective.
• If you select Messenger, a Messenger conversation will open when people click on your ad.
• If you select Website URL, a Messenger browser will open up to your website when people click on your ad.
• If you select App, your business's app will open when people click on your ad.
4. Select Automatic placements or Edit placements if desired.
• Automatic placements are designed to deliver ad impressions to the placement that is most likely to drive campaign results at the lowest possible cost. If you choose to edit placements, you can include Messenger, as long as Facebook feed is also selected.
5. Edit your audience, budget and schedule and click Next.
6. Select your format. View compatible formats.
• View ad specs for compatible formats.
7. To finish editing your ad, click Done.
8. Click Place Order to publish your ad.

* Nguồn: Facebook