The blueprint will appear in your hand, ready to be placed on the map. Useful Tips
In Factorio, open the Library or click the Import string icon (a blue document icon) on the shortcut bar. factorio_enUS_1_1_74.zip
To copy settings from one machine to another, use Shift + Right-click to copy, then Shift + Left-click to paste. The blueprint will appear in your hand, ready
Here is how to prepare and import a blueprint string into your game: How to Import a Blueprint in Factorio use Shift + Right-click to copy