Vertex AI Search for commerce (formerly known as Vertex AI Search for Retail and Google Cloud Retail Search) is a fully managed service for e-commerce search. According to Google it leverages the same semantic understanding that powers the Google web search. They promise strong query intent models and their knowledge graph that powers Google.com. Unlike traditional keyword-based engines that require extensive manual tuning, Vertex AI Search for Commerce promises good results "out of the box" using advanced Large Language Models (LLMs) and Google's pre-trained retail models.