You need this to get it done:
Action DetailsRequirements and how-to articles for Facebook's action:
A short description to accompany your ad (maximum of 90 characters.)
Decide on the audience you want your post to reach (gender, age, location, interests, etc.)
Duration and Budget
Choose how long you want your ad to run and what your daily budget is.
Choose currency, enter payment details and pay.
The link you wish to include in your ad (where you would like to send your audience to.)
A short headline to grab the audience's attention and briefly explain what your ad is about (maximum of 25 characters.)
Between 2 and 10 images.
File format: .jpg/.jpeg or .png
Maximum file size: 30MB
Ratio: Recommended 1:1
Resolution: Recommended at least 1080 x 1080 pixels
Decide which type call-to-action button you want on your ad (e.g. Learn More/Contact Us/Download/etc.)