Where do boosted posts appear on Facebook?
Boosted posts appear more frequently in the News Feed, so there’s a better chance the selected audience for the posts will see them. Boosted posts are labelled Sponsored. Boosted posts don’t appear in the right (advert) column of Facebook.
Once you’ve chosen your budget, you can look at Estimated People Reached to get an idea of how many people your boosted post can reach with the budget and targeting options you’ve chosen.
If you want a higher reach, you have to increase your budget or updating your targeting preferences to see how different factors impact your reach.
The budget you choose is a lifetime budget that will be spent throughout the duration of your boosted post. You’ll be charged for the impressions on your post, which may sometimes be less than your budget.