_:n4b5171bbd72f4b5f89e225fd67be6545xb0
<http://schema.org/description>
"Indexes are one of the most essential tools the database administrator can use to consciously aid the database engine and improve its performance. In this tutorial, you'll learn what indexes are, how to create them and check if they are used when querying the database."
<https://www.digitalocean.com/community/tutorials/how-to-use-indexes-in-mongodb>