Adhesive surface forces are the stickiness that some things have when they come in contact with each other. When two things are put together, like when you press your hand against a window, there is a force that holds them together. This force is called "adhesion".
Think about when you put a sticker on a piece of paper. The sticker sticks to the paper because of the adhesive surface force. The force is what makes the sticker stay stuck to the paper.
The adhesive surface force is made up of lots of tiny things called "molecules". These molecules are like very, very small building blocks that make up everything around us. When the molecules of one thing come in contact with the molecules of another thing, they stick together.
For example, when you touch a sticky note to a wall, the molecules of the sticky note stick to the molecules of the wall. The adhesive surface force is what holds the sticky note onto the wall.
Different things have different levels of stickiness. Some things are very sticky, like glue or chewing gum, while others are not very sticky at all.
In summary, adhesive surface forces are the things that make sticky things stick together, and they happen because of the molecules of different things coming in contact and sticking to each other.