Extract and Place the Filter File
Unzip the downloaded filter file. You’ll find several files, but the key document is the one labeled as the Loot Filter.
Drag and drop this document into the Path of Exile 2 folder.
Activate the Loot Filter In-Game
Open Path of Exile 2 and navigate to the Options menu.
Under the Game tab, locate the "Item Filter" section.
Use the drop-down menu to Path of exile currency select your filter, click Save, and close the menu.
Test Your Loot Filter
Start playing and monitor how items appear. Adjust the filter strictness if needed for cheap POE orbs optimal results.