（一）3月
the March 2024 core update – was the largest core update, according to Google. It started March 5 and completed 45 days later on April 19.
https://searchengineland.com/google-released-massive-search-quality-improvements-with-march-2024-core-update-and-multiple-spam-updates-438144
（二）8月
这次更新没有名称，只是叫做“core updates”。It started on August 15, 2024 and completed 19 days later on September 3, 2024.
https://developers.google.com/search/blog/2024/08/august-2024-core-update
这个网站也被影响了，两次流量下降，一次在3月，一次在8月。
参考：https://searchengineland.com/google-august-2024-core-update-rollout-is-now-complete-446225