Can anyone help me understand how to use a flash for real estate photography?

I’m a beginner so I need a cheap flash (I have a canon rebel t6 camera). I’ve watched YouTube videos on different flashes, for example the yongnuo flashes. But I’m just very confused on how it works. Do I need a separate trigger? Or is there a flash with a built in trigger? How can I use a flash when shooting... show more I’m a beginner so I need a cheap flash (I have a canon rebel t6 camera). I’ve watched YouTube videos on different flashes, for example the yongnuo flashes. But I’m just very confused on how it works. Do I need a separate trigger? Or is there a flash with a built in trigger? How can I use a flash when shooting multiple exposures?
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