Attach a polyethylene membrane to your substrate to reduce the amount of moisture migrating into the tiles and to act as an expansion moderator for the expected movement of tile over other flooring surfaces. Because agglomerate tiles are exceptionally vulnerable to moisture, you should not use cement- or water-based mortars during installation.
Apply an epoxy- or resin-based mortar to the membrane. Use a mortar product specifically recommended by your agglomerate tile manufacturer for best results. Apply the mortar with a V-notched trowel to the substrate and back of the tile and install the tile based on the manufacturer's recommendations.
Level the tile using a level across many tiles. Most agglomerate tile installations favor tight grout lines to create the most marble-like appearance. Keep the tiles clean during installation. Some tiles will not require grout products. Some manufacturers will recommend a grout installation. Follow the recommendations of your stone manufacturer for best results.