Explanation:
Panda later became part of Google's core algorithm.

ALSO KNOW (related points):
• What is RankBrain? → A machine-learning system introduced in 2015 that helps Google interpret queries
• What did the 'Helpful Content' system, introduced in 2022, target? → Content written mainly to rank in search engines rather than to help people
• What is the 'local pack' in Google search results? → The map with a small set of local business listings, shown for local-intent queries