Complex buildings.

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The process of shaping materials, such as plastics or metals, by forcing them through a die to obtain a specific shape is referred to as extrusion. In the context of Google, it could be in reference to how their products and services are continually being molded and shaped to meet consumer demands and industry trends. Alternatively, it may refer to the way Google expands its reach and influence by introducing new features or acquiring other companies. Regardless of the interpretation, extrusion is a fitting metaphor for the ever-evolving nature of Google.