A Plain English Guide to Real Time Bidding

How does real-time bidding work?

There are several pieces involved in the real-time bidding process. Let’s take a look at each one of them one-by-one before putting it all together.

• Advertiser: The advertiser is the company or brand that wants to place an ad online.
• Demand-Side Platform (DSP): The Demand-Side Platform is the service advertisers use to launch ad campaigns.
• Publisher: The publisher is the website or online property that wants to sell ad spaces, often referred to as “ad inventory.”
• Supply-Side Platform (SSP): The Supply-Side Platform is the service publishers use to make ad inventory available. SSPs run auctions where ad spaces are instantly purchased by the highest bidder. But this can’t happen unless an ad exchange facilitates the transaction.
• Ad Exchanges: The ad exchange connects companies who want to advertise and publishers who want to sell ad space. Ad exchanges carry out the bidding transaction automatically in real time by connecting both Demand-Side Platforms and Supply-Side Platforms.
• Impressions: Impressions refers to the number of times an ad is seen or scrolled past. In the real-time bidding process, advertisers don’t pay for one individual impression, but rather the cost per thousand impressions (CPM).

Now, let’s put it together. How exactly does real-time bidding work?

On the advertiser side, marketers use DSPs to set up their ad campaign and track its performance. Publishers, on the other hand, use Supply-Side Platforms (SSPs) to list their ad inventory and the price they charge. They then meet in the middle at the ad exchange, the marketplace where the real-time bidding actually takes place.

To determine what ad inventory to bid on, advertisers will set targeting parameters. For instance, a brand may only want to target users who are in a specific region or have visited their website recently.

So, advertisers, or specifically their Demand-Side Platforms, evaluate ad potential in real time and decide whether or not to place a bid and how much to bid.

Remember, advertisers set their bid through the Demand-Side Platform, while publishers’ Supply-Side Platform either accept or reject the bid. The prices are negotiated on a cost per thousand impressions, so the advertiser isn’t paying based on uptime or even dimensions. Instead, they’re paying for the amount of times, in thousands, that their ad is seen.

Let’s go through another example of how it works.

Real-Time Bidding Example

Let’s say Silk is a UK-based beauty brand that just launched a new brow line and is running a campaign. They set up their campaign on a Demand-Side Platform (DSP) and are targeting users who regularly shop for makeup products, are located in the Manchester area, and are between 18 to 30 years of age. The brand also wants its ads to only show on sites related to beauty and lifestyle.

A user visits a publisher’s site. The publisher’s Supply-Side Platform (SSP) sends a bid request to the ad exchange, where Silk’s DSP will be evaluating the value of the impression. The DSP will then determine if the user meets the parameters outlined in the campaign. If so, the DSP will submit a bid.

If Silk has the winning bid, the user will see the ad once the page loads. This process happens thousands of times on different webpages during the length of Silk’s ad campaign.

There are no RTB platforms because real-time bidding is a method of purchasing impressions, not a channel. However, you can use tools that can help you start the real-time bidding process. These tools help you either purchase ad inventory or place ad inventory for sale through RTB.

Below, we break down some platforms you might use if you’re looking to sell or purchase ad inventory online.

Real-Time Bidding Platforms For Advertisers

As an advertiser, you’ll want to find a Demand-Side Platform that allows you to manage several ad campaigns and set specific targeting parameters — down to the user’s most visited websites and preferred brands. Here are a few options:

Better Tracking

With RTB, advertisers can monitor their campaigns easily without relying on vendors. No need to reach out to multiple publishers and ask for reports, you can get them yourself on your DSP.

This also gives marketers the agility to pivot quickly if their campaign isn’t performing as expected. For instance, you might find that switching out one keyword for another may boost your campaign’s performance and align better with the audience you want to reach.

Better Targeting

When purchasing ads through RTB, you buy one impression at a time. This means that every time a website visitor or mobile app user visits a publisher’s site, you’re able to assess that person’s particular profile and see if it matches your target audience.

It makes for more accurate targeting as you can ensure your ads are only reaching the right people at the right time.

More Cost-Effective

The precision of the real-time bidding algorithm allows marketers to spend their ad dollars on high-value impressions.

Too often, brands launch marketing campaigns that only reach a portion of their target market, leaving the rest of the budget wasted on users who don’t fit the profile.

In addition, RTB takes much of the manual labor out of the online advertising process, allowing marketers to focus on other efforts.

Compromised Brand Safety

Where your ad shows up is as important as who sees it. This is because consumers judge brands’ ads based on the surrounding content.