I don’t understand that format:”//h2[@class=’card__title mdc-typography–headline6′]”. I could’t find documentation abot meaning @  etc. to create another filters to scrape other data for example phone number from tag.
@, //, ... represent abbreviated syntax for XPath selectors.
@abcis short for
//is short for
So, in other terms, your current query
//h2[@class='card__title mdc-typography--headline6'] represents the action of finding the first descendant- or self-node that has a
class attribute of