Glossary · Paid mediaTOFU
DSP (Demand-Side Platform)
The short answer
A DSP (Demand-Side Platform) is software that lets advertisers buy ad impressions across many websites, apps and streaming services through automated, real-time auctions. Instead of negotiating with each publisher, the advertiser sets targeting, budgets and bids in one place.
On the other side, publishers use supply-side platforms (SSPs) to sell their inventory. Ad exchanges connect the two.
What DSPs are used for
- Display and video across the open web
- Connected TV and OTT inventory
- Audio on streaming platforms
- Digital out-of-home screens
- Retail media — some DSPs specialise in retailer audiences
Questions to ask before using one
- Do we get seat-level or at least log-level transparency?
- What verification and brand-safety tools are included?
- What fees are taken along the supply path?
- Can we use inclusion lists and private marketplace deals?
- Is our budget large enough for the fixed costs to make sense?
DSP vs self-serve ad platforms
| DSP | Google Ads / Meta | |
|---|---|---|
| Inventory | Many exchanges and publishers | Platform's own inventory and networks |
| Minimum spend | Often higher | Low |
| Control | High over placements and deals | Varies |
| Best for | Reach, CTV, DOOH, premium deals | Performance at most budgets |
DSPs in practice
An advertiser uses a DSP to buy display, video and connected-TV inventory across many publishers in one platform, with audience targeting and frequency caps.
What a DSP offers
- Access to many publishers and exchanges
- Audience and contextual targeting
- Frequency control and reporting
DSPs in India
Indian advertisers use DSPs to reach audiences across publishers, apps and connected TV, often for awareness and retargeting. Brand-safety and fraud controls are essential.
Frequently asked questions
What's the difference between a DSP and Google Ads?
Google Ads is itself a buying platform for Google's inventory. Enterprise DSPs buy across many exchanges and publishers, with more control and more responsibility.
Do small brands need a DSP?
Usually not. Meta, Google and YouTube cover most needs until budgets are substantial.
What's an SSP?
A supply-side platform used by publishers to sell inventory to DSPs.
Is a DSP necessary for CTV?
Not always — YouTube CTV is available in Google Ads — but DSPs offer access to more streaming inventory.
Do small advertisers need a DSP?
Usually not — self-serve platforms like Google and Meta often suffice until budgets grow.
What's the difference between a DSP and an ad network?
A DSP buys across many exchanges and publishers; an ad network sells inventory from its own publisher group.
Related terms
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