It is best to wait at least 24 hours, and ideally 48 hours, after laying the tile before grouting. It allows the tile adhesive or mortar to fully cure and dry, ensuring that the tile is set correctly and can withstand the pressure while grouting. However, tiling and grouting are recommended within the time frame recommended by the manufacturer. As a result, it can reduce the chance of tiles shifting or cracking under the pressure of the grout