This document discusses how the author improved loading speeds on the Insights page of the Glipho social network by adding indexes to MongoDB. It describes Glipho as a text-based social network and explains that the original Insights page took 3.9 seconds to load due to making over 100 calls to the database without indexes. After analyzing the queries, adding indexes for fields like timestamp and action, loading time decreased by 98% to just 72 milliseconds. The author advocates for thoroughly understanding queries, testing indexes, and ensuring indexes evolve with changing queries.