By working with other workers and dividing up the tasks involved in production the overall productive process becomes more efficient because specialisation helps the workers to become more proficient in a smaller number of tasks.
For instance, rather than all villagers carry out all tasks it would be much more beneficial for the entire village to divide specialised tasks to individual villagers. This way each villager would become more focused and more skilled in that particular practice because of the 'learning by doing' approach. This is the basic concept invented by Adam Smith and his idea of the pin factory to increases productivity and efficiency in the production process.
