Google SEOUpdate history

Google MUM (Multitask Unified Model) (2021)

Multimodal, multilingual model for complex queries.

By Junaid Tariq · Updated · 1 min read
DateMay 18, 2021 (announced)
PlatformGoogle SEO
TypeAI model
Who it affectsAll sites

What happened

Google announced MUM (Multitask Unified Model), a multimodal and multilingual AI model it said was far more powerful than BERT, aimed at complex queries that require information from several sources. It’s been used in specific features rather than as a general ranking update.

Who it affected

All sites.

What it means for marketers today

MUM is an early example of the AI systems now powering features like AI Overviews. Create content that answers complex questions thoroughly.

See the full Google Algorithm Update History (2003–2026)

WhatsApp Call
Subscribe Get Audit