Joe Glombek discusses optimizing the use of indexes in Umbraco, focusing on the ExternalIndex for site search. He details how to define and modify fields within the index using `IConfigureNamedOptions<LuceneDirectoryIndexOptions>`, and explains the process of adding values to the index. Additionally, he covers registering configurations and rebuilding the index for updated content retrieval.
Nurhak Kaya's guide outlines how to sort items by a custom date in Umbraco v13+ using Examine. It highlights the need to store dates as "long" types rather than strings for proper sorting. The implementation includes creating a custom date field, updating the Examine index, and utilizing a search service to retrieve ordered results.