Each auto-boosting rule creates a new ad campaign in your Facebook ad account and in that campaign it stores all posts that meet rule's boosting conditions as new ad sets with one ad inside. When setting up Auto post boosting rule you run into budget settings. There are 2 types of budgets: Daily and Lifetime. Which option to choose? Let's look at these more closely.
1. Budget is defined at the Campaign level (applicable for CBO campaigns).
If you set the budget at the campaign level - it means you pay $10 daily for all posts being boosted simultaneously. The number of promoted posts is defined by setting Number of posts promoted at once.
Note, Lifetime budgets are not available at the campaign level.
2. Budget is defined at the Ad set level.
This type of budget is defined on Ad set settings tab and implies setting daily or lifetime budgets.
Let's say you want to to promote a certain number of posts at once, run them for 2 days and pay $10 for each post.
This way the system will do its best to spend $10 each day on each post promotion (each ad set specifically).
Another option is applying lifetime budget. It means you set the budget for every single post as $10 for 2 days period.
For more details on post boosting features, please visit out Help center or send a message in our app-chat if you need any help while setting up post boosting rules!