Explanation
There are several way in which you can give the agency access to your website's pixel:
* Assign the agency as a "Partner" under your Business Manager
* Assign the agency's employees as "people" with access to your pixel under the Business Manager Keep in mind that the proper way to assign an agency is through the "Partnership" tab. Therefore, what you need to do is assign them as partners and assign the pixel to the proper ad account. You don't have to add the agency's employees as those will be added when you assign the agency as a partner to your business manager.

Explanation
There are some advantages of using offline event tracking for physical stores.
* You can measure cross-channel conversions. In other words, you are able to measure your marketing efforts done on Facebook and Instagram at the same time as well as multi-device. So if a user logs into his Instagram account on his phone but also sees an ad on his Facebook Newsfeed on their computer, you can track those conversions.
* You can use this data to build custom audiences for re-marketing efforts and bring in existing customers back to the store.
* You can do long-term value campaigns as you can segment users based on purchasing behaviors and not just demographics or interests.

Explanation
Setting a bid cap can save your ad set from overspending for an event but, at the same time, if you set your cap too low Facebook may struggle to spend your budget, and this will negatively impact the distribution of your ad.
If your primary goal is to get as many results for your full budget as possible, you should not use a bid cap. If your primary goal is keeping your cost per result below a certain amount, go for the bid cap strategy.
To start setting your bid cap use an average cost per result from prior campaigns and a daily budget that is at least five times higher than your bid cap. This is because Facebook needs at least 50 events (the learning phase) within a week to properly optimize.
If you don't set a Bid Cap, Facebook will use the Pacing method to optimize your bid for the best results.
Pacing gives Facebook the flexibility to get you the best available results for your goals.
If you choose the lowest cost bid strategy Facebook will raise or lower your bid on an auction-by-auction basis; it's called "discount pacing."If you pick the target cost bid strategy, Facebook's pacing will consist in deciding which auctions to enter and which to skip; this is the "probabilistic pacing." Since you're trying to get the lowest cost per optimization event possible, Discount pacing lowers your bid when appropriate to help you get the least expensive results available. This is balanced against ensuring Facebook spends your full budget by the end of your ad set's lifetime.
Here's a simplified chart showing how this works with a $10 bid cap:

Since the target cost bid strategy is about stability rather than lower costs, Probabilistic pacing enters your ad set into only a selection of auctions based on the likely cost of their optimization event. Here's a simplified chart showing how this works with a $10 cost target:

* In practice, budget pacing and bid pacing are one process. Facebook adjusts your bid or which auctions it enters based on how much budget and time are left for your ad set.
* Similarly, Facebook may increase how much budget it spends if there's an opportunity to get many optimization events with costs aligned with your bid strategy.
* Facebook may also decrease how much budget it spends if there are few available optimization events with costs aligned with your bid strategy.

Explanation
There are multiple reasons why an ad set has spent some of your budgets but is still getting too few impressions. In this case, there are some things to keep in mind:
* Your ad did run for some time as it has spent $1 already.
* You have multiple ad sets. Two of which have only spent $1 each and the rest are correctly running.
What are some common issues here?
* Answer #1 and #2 are somehow related. There are instances where ad sets start running for a couple of hours and are then rejected by Facebook's team. In that case, these ad sets could have spent $1 each before they were blocked/rejected by Facebook.
* If Facebook rejected your ads, then by default, they will be inactive.
* You could have inactivated the ad sets by mistake at some point. So this answer is still valid.
Answer #4 is not possible. If it the ad sets were set up for a future date, then it would not have spent any money at all.
Answer #5 is also wrong. If your ads are active but not getting impressions, your audience could be too small
-NOT too large-. In this case, $50 would be too much budget for the audience you selected, but NOT too large.

Explanation
There are basically three options for buying ads on Facebook:
* Facebook Marketing Partners: Formerly called PMD's are Facebook partners that help you launch campaigns outside of the Facebook interface.
* Insertion Orders (IO): This option is done directly through a Facebook Sales Representative. Usually, you will go through an IO for reach and frequency.
* Ad Auction: The most common way to purchase ads on Facebook. When you launch ads through the Ads Manager, you are utilizing the ad auction option.
Ads Manager are tools you utilize through the Ad Auction.