If you use Obsididian you’ll very, very likely use the DataView plugin. The plugin’s documentation is quite detailed and there’s plenty of examples in Obsidian forum, but for a quick one stop place for the essentials then this Obsidian Rocks is the place to go: obsidian.rocks/dataview-…
https://obsidian.rocks/dataview-in-obsidian-a-beginners-guide/