When an organism reproduces it makes another organism of the same species.
Some organisms reproduce sexually. Cows make more cows and pigs make more pigs.
Sexual reproduction combines genes from a mother and a father, making a genetically unique organism.
Other organisms reproduce asexually.
In asexual reproduction, all the genes come from a single parent. Asexually produced offspring are genetically identical to the parent..
There are many methods of asexual reproduction. In some one-celled organisms, cell division is a method of asexual reproduction. Bacteria cells reproduce through cell division. The cell makes a copy of its DNA then sends the copy into a new bacteria cell. Some bacteria cells can reproduce fast, making a new cell every 20 minutes.
Another method of asexual reproduction is budding. Unicellular yeast cells grow new cells off of the side of another. When the cell is developed it falls off and a new yeast cell is produced.
Some organisms produce offspring by splitting into pieces. A sea anemone can split down the middle resulting in the production of another individual identical to the original. Some worms if split will continue to live as two identical worms.
Both sexual and asexual reproduction produce offspring however asexual reproduction makes genetically identical offspring and sexual reproduction makes unique offspring.
Try taking a cutting of a plant. You will be making another that has the same DNA as the parent plant. You just helped the plant to reproduce asexually!