Spiders often attack and prey on other insects or small invertebrates. They capture prey by weaving webs or ambushes, and then release venom to kill them.
However, not all spiders pose a threat to humans, most Most spiders will avoid contact with humans. They are more likely to flee than attack. People should respect the ecological role of spiders as they play an important role in controlling pest populations. If you don't want spiders in your home, you can take preventative measures such as keeping it clean, sealing cracks, and using insecticides.