In which scenario would you run a full rebuild of the index?

Running a full rebuild of the index is necessary when documents have been updated or overlaid with new text. This is crucial because indexing is a process that involves creating or updating an organized structure that allows quick access and retrieval of the data. When documents change, especially with updates to their content, the previously established index may no longer accurately reflect the current information. To ensure that the index provides accurate search results and reflects all modifications, a complete rebuild is warranted.

This process also helps maintain data integrity, ensuring that users searching for information are retrieving results based on the most current version of documents. Other scenarios, like not making any changes, adding keywords, or simply changing filters, may not require a full rebuild since they do not fundamentally alter the core content of the indexed documents.