Which social media platform first became widely adopted by architectural firms for visual marketing, dramatically changing how projects were showcased online?

The digital transformation of architectural marketing has dramatically changed how firms showcase their work and connect with clients. One particular social media platform revolutionized how architectural projects are shared and discovered, becoming the go-to visual platform for architects worldwide. Can you identify which platform first sparked this visual marketing revolution in architecture?

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Pinterest (2010)
Instagram (2010)
Houzz (2009)
Behance (2006)