When you start to download your creative, interfaces look different for advertising objectives.
Mobile App Installs, Mobile App Re-engagement
The additional options for Ad Campaign creation with Mobile App promotion objective are: Deep link, and Call to action (Install Mobile App, Open Mobile App, etc)
For any Mobile Apps redirecting users to another website there is an optional field: Link Caption.
The mandatory parameter for any Website Clicks campaign is Website URL. You are also able to automatically paste macros. Macros are used to automate replacing some parts of a text with variable blocks in Facebook and Instagram campaigns. As an example, we could replace part of a URL or Deep Links to send different parameters there (for example UTM tags, params to CRM etc).
For a Website Conversions campaign you have the option to choose a conversion from the pixels list.
Facebook Page Likes
When creating a Page Promotion or Page Likes campaign you are able to select a link (Link URL) which will redirect user to a particular page section: About, Timeline, All Activity, Photos, Videos, Likes.
Page Post Engagement
To promote a post you need to choose the page (Page) and the post (Post) that you would like to promote.