Need help understanding dual agency - NJ seller

[Sandy S.]

I am selling my place and my realtor provided me with an informed consent regarding dual agency. I am very confused by this.

I am not clear if I should sign this as a seller, as I understood that this does not put me in my realtor's best interest. My understanding from my realtor is that this is required by their brokerage.

I am not sure if I can refuse this (it is with a big brokerage - i.e., KW).  If so, is this a bad idea? Why or why not?