Smearing
‘Smearing’ is a friction-based technique for climbing or bouldering. It involves pressing the sole of your shoe into the rock, generally keeping your heel lower than your forefoot, to create as large a contact area as possible to securely grip smooth surfaces such as slabs or volumes—and impress with your performance on both. This technique requires flexible shoes with a soft sole and grippy rubber so you can create as large a contact area as possible between the rubber and the climbing/bouldering surface so as to generate the desired friction.