What does "conspiracy theory" mean? Could you give me some examples?

Native speaker’s answer
Rebecca
A conspiracy theory is any theory that a large, influential organization is secretly responsible for an event or condition. For example, one popular American conspiracy is that 9/11 was actually committed by the US government and not the Taliban. Additionally, during the pandemic era, many conspiracy theories have arisen about the origins of the COVID-19 virus. Ex: I read a conspiracy theory online that Avril Lavigne is actually dead and an imposter has taken her place. Ex: There's a conspiracy theory that COVID-19 was actually created in a lab by a big pharmaceutical company.