For over a decade, the golden rule of Google Ads was control.
We built Single Keyword Ad Groups (SCAGs). We obsessively used Exact Match. We treated Broad Match like a dangerous leak in a boat—something to be plugged immediately lest it drain the budget on irrelevant clicks.
But in 2026, the rules have inverted.
If you are still clinging to a purely Exact Match structure, you are likely strangling your campaign’s performance. Google’s AI has evolved, and the “Broad Match + Smart Bidding” combination is no longer a budget-waster. It is the primary engine for scaling accounts.
However, you cannot just turn on Broad Match and walk away. That will waste your money. You need a new containment strategy.
We call it the “Theme” Strategy.
Here is how to safely transition your account to Broad Match in 2026 without losing control of your spend.
Why “Exact Match” is Dying (Slowly)
To be clear, Exact Match is not useless. But it is limited.
In the past, users searched in simple fragments like “buy running shoes.” Today, thanks to voice search and natural language processing (like Gemini and ChatGPT), users search in complex sentences: “best running shoes for flat feet marathon training.”
Exact Match simply cannot catch all these variations. There are too many.
If you only bid on [running shoes], you miss the high-intent user searching for the specific solution. You are leaving the most valuable traffic on the table because it does not match your rigid keyword list.
The New Logic: Keywords as Signals
In 2026, a keyword is no longer a strict filter. It is a signal.
When you use Broad Match with Smart Bidding (like Target CPA or Maximize Conversions), you are telling Google: “Here is the general concept. Now, use your user data—browsing history, location, past purchases—to find people interested in this concept who are likely to convert.”
The “Theme” Strategy: Moving from SCAGs to STAGs
The old way was SCAGs (Single Keyword Ad Groups). The new way is STAGs (Single Theme Ad Groups).
This is the core of the Broad Match strategy. Instead of fracturing your account into 500 tiny ad groups, you consolidate them into larger, data-rich buckets.
What is a STAG?
A Single Theme Ad Group contains:
- 5 to 20 Broad Match keywords that all relate to a single specific topic (e.g., “CRM Software for Small Business”).
- Ads that speak directly to that theme.
- Smart Bidding that governs the spend.
Why It Works
Smart Bidding craves data. A tiny ad group with 10 clicks a month starves the AI. A “Theme” ad group with 2,000 clicks a month gives the AI enough signal to learn which users are buyers and which are browsers.
Example: The “Plumber” Pivot
- Old Way (SCAGs): You have separate ad groups for [emergency plumber], [24 hour plumber], [urgent plumbing].
- New Way (STAGs): You create one “Emergency Service” Ad Group. You add emergency plumber, 24 hour plumber, and urgent plumbing as Broad Match keywords.
- The Result: Google’s AI notices that a user searching “pipe burst help” (which you didn’t have a keyword for) fits the theme and intent of an emergency. It serves the ad. You get the lead.
Related Reading: Worried about giving AI too much control? Read our guide on AI vs. Human: Where a Google Ads Manager Still Adds Value.
The Safety Net: Negative Keywords are Mandatory
This is the most critical part of this guide. You cannot run Broad Match without a rigorous Negative Keyword strategy.
Broad Match is like a fire hose. It covers everything. Your job is not to aim the water, but to build the walls that keep it contained.
The “Pre-emptive” Block List
Before you launch a Broad Match campaign, you must upload a robust Negative Keyword List.
- Competitors: unless you specifically want to target them.
- “Free” Seekers: words like free, job, hiring, definition, DIY, course, salary.
- Irrelevant Industries: If you sell enterprise software, block words like game, app, download, crack.
The Weekly Ritual
With Broad Match, the Search Terms Report is your best friend. In the first month, you must check this weekly.
- Sort by “Impressions.”
- Look for terms that are “technically” relevant but commercially useless.
- Add them to your Negative list immediately.
By aggressively pruning the bad matches, you force the AI to focus only on the high-quality traffic within that Broad Match theme.
Case Study: Scaling Volume with Broad Match
We recently applied the “Theme” strategy for a Bizi Digital client in the SaaS education space.
The Challenge: The client was stuck at 50 leads/month with a £30 Cost Per Lead (CPL). They wanted 100 leads. We tried adding more Exact Match keywords, but the volume just wasn’t there.
The Strategy:
- We took their top-performing Exact Match keywords (high intent) and moved them into a new “Broad Match Experiment” campaign.
- We applied Target CPA bidding, setting the target at their historical average (£30).
- We layered on a massive negative keyword list to block “student/login” traffic.
The Result (60 Days Later):
- Lead Volume: Increased to 115 leads/month (130% increase).
- CPL: Stabilised at £34 (slightly higher, but acceptable for the volume).
- Discovery: We found that 40% of the new conversions came from search terms we never would have thought to add manually.
Broad Match found the audience that Exact Match couldn’t see.
When to Stick to Exact Match (It is Not Dead Yet)
Does this mean you should delete all Exact Match keywords? Absolutely not.
There are specific scenarios where Exact Match is still superior in 2026:
1. Brand Protection When bidding on your own brand name (e.g., “Bizi Digital”), always use Exact or Phrase match. You do not want Broad Match showing your brand ad for a competitor’s query just because the themes are similar.
2. Tight Budget Constraints If you have a very small budget (e.g., under £500/month), Broad Match might be too volatile. Stick to Exact Match to ensure every penny goes to the most obvious, high-intent searches.
3. Compliance & Regulation If you are in a highly regulated industry (like finance or pharmaceuticals) where you cannot appear for certain terms legally, Exact Match gives you the granular safety you need.
Unsure if your current keyword mix is wasting money?Use our Ultimate PPC Audit Checklist or book a Google Ads Audit.
Summary: The 2026 Keyword Checklist
If you are ready to modernize your account structure, follow this checklist:
- Audit: Identify ad groups with low volume that can be consolidated.
- Group: Create “Theme” based ad groups (STAGs).
- Switch: Add Broad Match keywords (3–5 per theme).
- Bid: Ensure you are using Smart Bidding (Max Conversions or Target CPA). Broad Match requires Smart Bidding to function correctly.
- Block: Apply a heavy Negative Keyword list immediately.
- Monitor: Watch the Search Terms report like a hawk for the first 30 days.
FAQs: Broad Match & Smart Bidding
It can if you are not careful. This is why we recommend using Target CPA (Cost Per Acquisition) rather than “Maximize Clicks.” Target CPA acts as a brake. If the AI sees a broad search term that is unlikely to convert at your price point, it won’t bid.
Phrase Match still exists, but in 2026, its behaviour has become very similar to Broad Match. It has lost much of its strictness. We often find it easier to run a mix of Exact (for control) and Broad (for growth), skipping Phrase Match entirely in sophisticated accounts.
Keep it tight. 5 to 15 keywords per ad group is usually enough to define the theme. If you have 50 keywords, you are likely mixing two different themes. Split them up.
Yes, but “Ad Relevance” is the key metric. Ensure your ad copy actually relates to the theme of your keywords. If you target “Accounting Software” broadly, do not show an ad about “Tax Services.”