Note:
This article is about installing Datapacks from files on Minecraft Java Edition.How to enable built-in experimental datapacks is explained here: How to enable experimental features (Minecraft: Java Edition)
If you are looking for help with Minecraft Bedrock Edition Addons, check out this article: Installing Addons (Minecraft Bedrock Edition)
Datapacks (Minecraft Java Edition)
Datapacks can be uploaded directly to the datapacks folder of your world.