SGE (Search Generative Experience) — The Predecessor of AI Overviews
Definition
SGE (Search Generative Experience) is an experimental AI search feature Google introduced in 2023, which was officially launched as AI Overviews in May 2024.
TL;DR
SGE was an experimental AI search feature announced at Google I/O 2023 and offered on a limited basis through Search Labs. In May 2024, it was officially launched under the new name "AI Overviews." Understanding the lessons from the SGE era and the transition to AI Overviews helps you grasp the direction of Google's AI search.
Timeline from SGE to AI Overviews
| Time | Event |
|---|---|
| May 2023 | SGE announced at Google I/O, offered experimentally in Search Labs |
| May 2023–Apr 2024 | SGE experimental period: collecting user feedback, improving accuracy |
| May 2024 | Officially launched as "AI Overviews" at Google I/O (US) |
| H2 2024 | Global expansion of AI Overviews begins |
| H1 2025 | Support for 200+ countries and 40 languages |
| Sep 2025 | Official Korean-language support, AI Mode introduced |
Lessons from the SGE Experimental Period
Characteristics of AI search that emerged during the SGE experimental period:
- Accuracy problems: Early SGE produced incorrect information in some cases. To address this, Google restricted AI answers on YMYL queries.
- Source dependency: It was confirmed that 86–92% of SGE/AI Overviews citation sources come from domains in Google's top 10.
- CTR impact: When an AI answer is shown, the CTR of traditional search results decreases, but cited sites actually see increased traffic.
These lessons became the basis for today's AI Overviews optimization strategy.
Current Status
The term SGE is no longer used officially. Google's AI search features are now divided into the following:
- AI Overviews: Automatic AI answers at the top of search results
- AI Mode: Conversational, in-depth AI search
Optimization strategies from the SGE era apply directly to AI Overviews, so the core principles of older SGE-related guides are still valid.
Frequently Asked Questions
Q. Are SGE and AI Overviews the same thing?
A. SGE evolved into AI Overviews. The core technology (Gemini models + Google search index grounding) is the same, but AI Overviews is more stable and deployed more broadly.
References
- Google (2023). Supercharging Search with generative AI. https://blog.google/products/search/generative-ai-search/
- Google (2024). AI Overviews and more: new ways to search. https://blog.google/products/search/generative-ai-google-search-may-2024/