What is the datatype to store multiselect picklists?

Question

In a recruitment app, for the application model I'd like to have a multiselect picklist called desired_industry.

I would like to be able to filter users by their desired industries, and to notify users when a new job is created, for their chosen industries.

I'm a bit confused as to how to approach this though.

When I'm making the model, what datatype should I ascribe to it?

If it's a string, how will I go about making sure that I can filter based on the answers, etc?

Answer 1

If you want to select users by industries, you can make separate model for the industries which has many-to-many relationship with users model.