Depending on the type of succulent, you may choose to remove a leaf or take a cutting.
If you choose to remove the leaf, you will need to carefully twist the leaf off and make sure it’s a clean cut and nothing is left behind. Many sure this is done gently and don’t rush this.
If you choose to take a cutting, you will need to cut a few centimetres from the top and just above the leaf on the stem. Like twisting the leaf off, this will need to be a clean cut, so make sure you use a pair of sharp scissors.