Levelling fence posts is a crucial step in ensuring a sturdy and aesthetically pleasing fence. To achieve proper levelling, dig the post holes to a depth appropriate for the fence’s height and soil conditions. Place the posts in the holes and use a spirit level to adjust their vertical alignment. Securely tamp the soil around the posts, ensuring it is compacted and level in all directions. Finally, use a string line or level to align the posts horizontally, ensuring the fence’s top and bottom rails will be parallel.