What is a Supply-Side Platform? A Definitive Guide

Marketers often face significant challenges connecting audiences to advertisers. With over $674 billion spent on advertising each year, this becomes a pressing issue.

While traditional advertising does offer certain benefits, it needs help to deliver personalized and relevant advertisements. This leads to missed opportunities and wasted resources.

This is where the supply-side platform (SSP) comes into play. It solves the problem of inefficient ad placements and limited targeting capabilities. This enables publishers to effectively manage and monetize their ad inventory.

Let’s take a closer look and find out.

What is a Supply-Side Platform?

A supply-side platform, or supply-side platform, is an advertising technology (adte­ch) platform utilized to manage and coordinate the distribution and supply of ad inventories. SSPs aid digital media owners and publishers in selling ad space.

In programmatic advertising, SSPs are a crucial part of the real-time bidding (RTB) process. By connecting demand-side platforms (DSPs) and other ad exchanges to ad inventory management, they enable publishers to maximize their offerings.

By widening its reach to various potential buyers, the publisher site can effectively enhance revenue generation from its inventory. Consequently, SSPs are frequently identified as yield optimization platforms within the advertising industry.

How Do Supply-Side Platforms Work?

Supply-side platforms (SSPs) are crucial for real-time bidding transactions. They handle several key processes, including:

  • Automated ad sales: SSPs sell publishers’ ad inventory to demand-side platforms via ad exchanges in real-time.
  • Ad network optimization: By selling individual impressions, SSPs give publishers more control. Publishers can see who buys their inventory and optimize ad requests.
  • Frequency capping: SSPs and DSPs work together to limit how often a visitor sees the same ad.
  • Reliability: Publishers can ensure only relevant ad networks bid on their available ad space through SSPs.

What are the Main Components of an SSP?

  • Ad Exchange: An ad exchange is a system that allows supply-side platforms (SSPs) and demand-side platforms (DSPs) to communicate and facilitate the buying and selling of ads through real-time bidding transactions. It’s a digital marketplace where publishers and advertisers meet.
  • Analytics re­ports: SSPs give detailed reports about how well the ad inventory performs. This gives publishers a chance to improve their ad campaigns and get better results.
  • Ad inventory management: An SSP gives publishers control over their inventory. They can manage the types of ads being sold on their platforms.
  • Inte­grations: SSPs can connect with other ad-tech tools. This allows publishers to gain more insights to reach relevant audiences with their ads.
  • He­ader bidding: Header bidding is a technology that allows publishers to request bids from multiple demand sources at the same time, increasing their revenue.

What is an example of a Supply-side Platform?

A great supply-side platform example is Amazon Publisher Services (APS). Amazon acts as both a supply-side platform (SSP) and a demand-side platform (DSP) in the world of programmatic advertising. Amazon Publisher Services (APS) is Amazon’s SSP. It connects Web publishers with advertisers using the Amazon DSP. APS helps publishers sell their ad inventory to advertisers. This allows publishers to make money from their ad space and reach more people outside of Amazon’s own websites.

On the flip side, Amazon’s DSP (Demand-Side Platform) enables advertisers to programmatically purchase display, video, and audio ads on and off Amazon. Advertisers can target their desired audience using Amazon’s shopper data. The DSP offers self-managed digital media campaigns both on and off the Amazon platform.

How Does Supply-side Platform Function in Programmatic Advertising?

An SSP operates within the programmatic advertising ecosystem in this manner:

  • It gives publishers tools to efficiently manage their ad inventory. They can set up ad formats, pricing, targeting options, and placements. This ensures optimal use of the available ad space.
  • Real-time bidding (RTB) enables the real-time auctioning of ad impressions to multiple demand sources like DSPs and ad exchanges through SSPs. RTB allows publishers to sell ad inventory to the highest bidder in real time, maximizing revenue potential.
  • Yield optimization algorithms and data analysis determine the best possible price for each impression. Factors like historical performance, audience data, and market demand are considered. This aids in publisher monetization through maximum ad revenue from their inventory.
  • SSPs integrate publishers with various demand sources: DSPs, ad networks, and exchanges. This allows publishers access to a wide range of advertisers and demand partners. The chances of selling advertising inventory at competitive prices increase.
  • Real-time reporting and analytics track ad inventory performance. Publishers gain insights into metrics like impressions, clicks, fill rates, and revenue. This enables data-driven decisions and optimizes ad strategies.
  • SSPs commonly institute measures to uphold ad quality and brand safety. These safeguards aim to ensure ads appear on publishers’ websites according to specific criteria. This practice shields the publisher’s brand reputation and fosters favorable user engagement.

Also Read: Demand Side Platform for Programmatic Advertising: A Beginner’s Guide

How Do Supply-Side Platforms Benefit Publishers?

SSPs streamline managing multiple ad networks or exchanges simultaneously by enabling connections with a larger pool of advertisers.

Moreover, an excellent supply platform should make your inventory accessible to potential buyers in the market for maximum pricing.

Collaborating with a premium supply-side platform ensures success, as multiple high-quality demand sources ensure inventory sales at optimal prices. For publishers, the primary advantages of SSPs include:

Granular Reporting

Reporting and data analysis are crucial for a thriving business to identify successes and failures.

To maximize profits, understanding your inventory’s earnings and value is necessary.

A proficient platform provides an in-depth reporting system, aiding decisions on selling inventory or optimizing yield.

Dynamic Price

The best SSP should allow setting soft and hard price floors at minimum CPMs, offering flexibility to maximize revenue.

Combining Varied Ad Ne­tworks

Supply-side platforms have access to different ad exchanges, demand-side platforms, and networks.

This capability allows numerous buyers to join real-time bidding auctions. As a result, publishers experience increased yield from their ad inventory.

Uncomplicated and transparent operation

While programmatic advertising aims to streamline processes, its landscape seems intricate.

A supply-side platform should exhibit user-friendliness, straightforward integration, and provide comprehensive performance data analysis.

Safeguarding Brand Reputation

Supply-side platforms enable publishers to only offer ad space to specific buyers or via certain channels.

Consequentially, this feature enhances brand safety by preventing undesirable advertisements from appearing on websites.

What are the Best Supply-Side Platform Companies?

Selecting an SSP provider is often determined by the campaign’s nature, budget, goals, strategy, and target audience. Choosing the ideal one for your unique requirements is crucial to your company’s success.

An optimal service delivery partner (SSP) for publishers should facilitate the sale of their advertising inventory with minimal effort and optimal performance while maintaining a human and customized touch throughout. Put otherwise, the greatest SSP company offers added value, high-quality reporting tools, and a truly customized solution.

Below are some of the best SSP companies:


Adtellige­nt Platform delivers comprehensive supply-side technology, optimizing yie­ld for publishers through efficient ad se­rving. This platform equips publishers with advanced programmatic optimization tools, inventory management, and partner connections. Powered by predictive algorithms and real-time data analysis, Adtellige­nt maximizes revenue potential by delivering targeted, relevant ads to audiences. Moreover, it offers robust malware detection, ensuring only genuine human impressions reach advertisers.


Vertoz is an innovative programmatic advertising company, replacing traditional media buying and selling methods with cutting-edge mone­tization solutions. As an SSP, Vertoz connects publishers with various advertisers through programmatic advertising, enabling efficient, targeted ad placements. Leveraging advanced technology and data-driven insights, Vertoz helps publishers optimize ad revenue and deliver personalized advertisements to their audiences.


PubMatic combines an SSP, cloud infrastructure, and ad technology solutions to boost ad ROI for web publishers. Its programmatic ad stack helps publishers optimize performance through efficient ad serving, yield management, and audience targeting tools. By leveraging real-time bidding and data-driven insights, PubMatic enables publishers to maximize ad revenue and deliver relevant advertisements to their audience.

Supply-Side Platform Vs Demand-Side Platform

Supply-side platforms and demand-side platforms are important parts of online ad buying and selling.

A demand-side platform is a tool advertisers use to buy ads. They can target audiences, bid in real-time, and optimize campaigns. Using data, DSPs help advertisers place ads strategically. This aims to meet campaign goals and maximize return on investment.

In contrast, a supply-side platform automates ad space selling for publishers. Publishers connect with demand sources like DSPs through SSPs. Ad impressions are auctioned in real-time to get the best prices. Features like yield optimization, inventory management, and reporting help boost ad revenue. Publishers can fill inventory with relevant, high-paying ads.

End Note

A supply-side platform is an essential tool for publishers navigating the programmatic advertising landscape. Publishers who use SSPs can tap into increased revenue opportunities.

Adtellige­ntadvertising technologyAmazondemand-side platformsMartech 360Programmatic AdsPubMaticRTBsupply-side platformVertoz