Setting a Central Location in Google Maps

Hi Experts,

I am just starting out with Google Maps API, and every example that I see starts off with a static central location, like Toronto that I have below.

My question is, do I really need a central location, because I dont know where that center will be. Toronto is in Ontario, but the user may want to see stores in BC. I am still working towards preparing the longitude/latitude, but I just thinking about my next step.

function get_map(){

    var toronto = {lat: 43.6560531, lng: -79.3869317};
    map = new google.maps.Map(document.getElementById('results_map'), {
      zoom: 12,
      center: toronto
    });
    
    geocoder = new google.maps.Geocoder();
  
}

Thank you