Broad Core Update
One of the several times a year when Google re-evaluates the relative value of content across the entire web and reshuffles rankings globally.
Analogy Mental model
The end-of-term reselection where every class is reordered. You may have dropped five places without doing anything wrong, simply because several sites behind you improved faster.
In practice What you actually do
These roll out over two to four weeks. Do not restructure the site or rewrite titles in the middle of one, because you will not know what caused the result. Wait for completion, then compare two weeks before against two weeks after and look for the dimension where the sites that overtook you are better.
Where people get burned Pitfalls
Recovery from a core update usually waits for the next core update, which can be two or three months away. Rewriting content the next morning does not restore anything by itself; it only positions you for the next reassessment.
This entry was written in English from the Chinese original, not machine-translated. Read the Chinese version →