I want to move particles based on my fluid sim. Do I need to import a volume velocity to my pop network? How would I go about it?
I've tried to Google it but can't really find a solution. I am new quite new to houdini, primarily been a max user.

you can use POP Advect By Volumes DOP in your POP Network, then point it to your geometry with velocity field
you may want to set Advection Type to Update Position, depending on your needs

you can as well use Solver SOP and VDB Advect Points, where you'll plug your points and VDB vel volume

Thanks, got it working like i wanted when i set advection type to update velocity.

I had to put it on
Velocity source: DOP Data
and
DOP Object: pyro