Grafting is like taking two different plants and making them become one super plant!
First, you need to find two plants that have different qualities. Maybe one plant makes really juicy fruit but is weak to diseases and another plant is strong and healthy but doesn't make good fruit.
Next, you cut off a tiny part of each plant, called a "scion", and make sure the edges match up. Then, you carefully tape or tie the two pieces together and wait.
Over time, the plants will grow together and become one big, strong plant with the best qualities of both plants! This is called a "grafted plant".
It's kind of like making a Franken-plant, but a good kind of Franken-plant that doesn't hurt anyone.