Term
STAG (Single Theme Ad Group)
A structural pattern where each ad group covers a tightly scoped theme with several keyword variants. The modern alternative to SKAG — compatible with Smart Bidding.
STAG — in more detail
Single Theme Ad Groups (STAG) bundle 5–20 closely related keywords into one ad group — for example all modifier variants of “women’s running shoes”. The approach addresses SKAG’s main weakness in the Smart Bidding era: too few conversions per ad group to give automated bidding a reliable signal. STAG keeps ad relevance high (all keywords match the same ad and landing page) while giving strategies like tCPA, tROAS, or Maximize Conversions enough volume to learn cleanly.
Example / In practice
Ad group “Women’s running shoes” contains keywords +running +shoes +women, "running shoes for women", [women running shoe], ladies running shoes, and similar variants. A Responsive Search Ad with theme-level headlines (“Running Shoes for Women”, “Top Models 2026”) serves all of them, and Smart Bidding sees aggregated conversion signals for the whole theme.
Distinction from similar terms
SKAG goes one step tighter (1 keyword); Hagakure structure goes broader still (1 ad group per main theme, often used to flatten an account). STAG sits in between and is today’s common default for Smart-Bidding-driven Search campaigns.
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Ad Group
A structural layer in Google Ads between campaign and ad. Bundles keywords, ads, and optionally audiences that belong together thematically and are managed jointly.
LexikonGoogle Ads account structure — from campaign down to ad group, set up right
Account segmentation, campaign types, ad groups, SKAG/STAG, match types, negatives and brand/generic/competitor — woven together.
NewsGoogle Ads launches Journey-Aware Bidding and expands Smart Bidding Exploration
Smart Bidding now learns from the full lead-to-sale funnel. Smart Bidding Exploration is rolling out to Performance Max and Shopping.