Black Friday 2026: Make Your Advertising Budget Work Harder with a CSS Partner

Why Black Friday Makes Google Shopping More Expensive

On 27 November 2026, millions of shoppers will be searching for deals, comparing prices, and making purchasing decisions.

For online retailers, this creates an enormous opportunity. However, more demand also attracts more advertisers competing for the same customers.

During Black Friday, several factors put additional pressure on Google Shopping campaigns:

• More aggressive bidding: Retailers increase their advertising budgets to capture additional sales.
• Higher competition: More advertisers compete for visibility across popular product categories.
• Lower profit margins: Black Friday discounts reduce the amount of profit available from each order.
• Limited advertising budgets: Smaller retailers often find it difficult to compete with larger brands that have significantly higher marketing budgets.

The result? Even when sales increase, profitability can suffer.

This is why successful Black Friday advertising isn't just about generating more clicks. It's about getting more value from every part of your budget you invest.

And that's where a CSS Partner becomes particularly interesting.

The Google Shopping Advantage Many Retailers Are Missing

Many online retailers don't realize that the way their Shopping ads enter Google's advertising auctions can influence their advertising efficiency.

In eligible European markets, Shopping ads are placed through a Comparison Shopping Service, or CSS. By default, many retailers use Google's own service, Google Shopping.

However, Google Shopping applies a margin to bids before entering them into the auction. Independent CSS Partners operate without that Google Shopping margin.

According to Google's official explanation of the CSS system, Google Shopping deducts a fixed percentage margin from merchant bids to meet its profitability requirements. Source: Google Merchant Center Help

This creates an opportunity for retailers using an independent CSS Partner.

How the 20% CSS Advantage Works

Consider a simplified example with a £1.00 maximum CPC bid.

Illustrative comparison based on an assumed 20% Google Shopping margin. Actual auction outcomes and CPC savings can vary.

With an independent CSS Partner, your full bid can compete in the auction without Google's own CSS margin. That gives you two important opportunities:

1. 1Reduce your advertising costs. You may be able to maintain comparable visibility while paying less per click.
2. 2Become more competitive. Keep your existing bids and benefit from greater effective bidding power, potentially improving your ability to compete for valuable Shopping placements.

Both strategies can be valuable during Black Friday.

Why the CSS Advantage Matters Even More on Black Friday

A 20% potential CPC advantage is useful throughout the year. But during Black Friday, its financial impact can become especially important. There are three reasons.

1. Protect Your Profit Margins When You're Offering Discounts

Black Friday is all about attractive prices. But discounts already reduce the margin you earn on every order.

Imagine you're selling a product for £17, temporarily discounted to £80. If you spend £12 on advertising to generate that sale, your advertising cost consumes 15% of the revenue.

Reducing that acquisition cost to £9.60 would free up another £2.40 per sale. That might not sound dramatic. But across hundreds or thousands of orders, the difference can become substantial.

A CSS Partner won't automatically reduce your acquisition cost by 20%. However, the auction advantage can help improve advertising efficiency precisely when your margins are under pressure.

2. Compete More Effectively Without Increasing Your Budget

Large retailers often have a significant advantage during Black Friday: bigger advertising budgets. They can afford to increase bids aggressively to capture additional traffic.

Smaller and medium-sized retailers need to be more efficient. Using an independent CSS Partner helps ensure that your Shopping bids enter the auction without Google's own CSS margin. This means your existing budget can work harder.

Instead of spending more simply to maintain competitiveness, you can improve the underlying economics of your Shopping advertising.

3. Make Every Additional Click More Valuable

Black Friday is a period when purchasing intent can be exceptionally high. People aren't just researching products. Many are actively looking for attractive deals and are ready to buy. That makes additional qualified traffic valuable.

Consider a simplified example of a retailer investing £10,000 in Google Shopping advertising.

Those additional visits could translate into more sales without requiring an increase in your advertising spend. The actual result depends on competition, bidding strategies, product performance, conversion rates and other auction factors.

Do You Need to Change Your Google Shopping Campaigns?

One of the biggest advantages of switching to an independent CSS Partner is how little you need to change. You can continue using your existing Google Ads and Google Merchant Center accounts.

Your everyday campaign management remains familiar:

• Your existing Google Ads account stays in place.
• Your product feed and Merchant Center remain available.
• Your Shopping and Performance Max campaigns can continue operating.
• Your historical performance data remains in your Google Ads account.
• You maintain control over budgets, bidding strategies and campaign optimization.

The important difference is that your Shopping ads are represented by an independent CSS rather than Google Shopping.

Google confirms that merchants can work with different Comparison Shopping Services and can switch between them. Source: Google Merchant Center Help

In other words, gaining the CSS advantage doesn't require rebuilding your advertising strategy right before the busiest shopping period of the year.

How to Prepare Your Google Shopping Campaigns for Black Friday

Switching to an independent CSS Partner is one way to improve efficiency. But the best Black Friday results come from combining that advantage with a well-prepared advertising strategy.

Optimize Your Product Feed Before Traffic Peaks

Make sure your product titles, images, prices, availability and product identifiers are accurate. High-quality product data helps Google understand your products and match them with relevant searches.

Also ensure that your Black Friday promotions are correctly reflected in your feed and landing pages.

Focus Your Budget on Profitable Products

Not every product deserves the same level of advertising investment. Identify products with attractive margins, strong conversion rates and competitive Black Friday offers.

Prioritize the products most likely to generate profitable orders, rather than simply maximizing traffic across your entire catalog.

Review Your Bidding Strategy

Black Friday can change conversion rates, average order values and competitive conditions. Review your bidding targets and budgets before your promotions begin.

For campaigns using automated bidding, evaluate whether seasonal adjustments are appropriate. Avoid making unnecessary last-minute changes that could disrupt performance.

Set Up Your CSS Advantage Early

Don't leave improvements to your advertising setup until Black Friday itself. Switching CSS Partners is generally straightforward, but account permissions and approval processes can require additional steps.

If you're moving from another CSS provider, the switch can take up to 14 days to take effect after you confirm it, so start well before the end of November.

Completing the switch beforehand gives you an opportunity to confirm that everything works correctly before traffic and competition increase.