Why was slavery important In Athens?

"Having slaves to carry on the business was important since there were no large industrial firms in Athens."

Well they did a lot of jobs By approximately 430 BC, Athens had 115,000 slaves in a total population of 315,000 people, statistically meaning that nearly half the population had one slave. They were used both domestically and publically for labour in workshops and factories. Domestically slaves had a variety of positions and given various titles according to their jobs, such a wet nurse and a trophos,.