Notice of proposed allocation to small claims track

[Bellarose]

Hi guys I have posted previously with all the info leading up to this but can’t find my post.
I sent a defence for a county court claim, for a parking ticket, and now have received this. It’s aaking me to agree or disagree to mediation.
just wondering what I should do?
ive never heard of this before.
many thanks for reading and any advice gratefully received!
thanks!