If I have multi-properties, can guests search for properties based on location?

Yes, but only using the Listing Style Format.

You can find instructions on how to switch to the listing style format for your multi-property website here: https://promotemyplace.zendesk.com/hc/en-us/articles/216229463-How-to-switch-from-multi-property-Standard-Format-to-Listing-Style-Format

Once you’ve done this, go to Widgets and check the box next to the Property Search Widget.

Then go to Widget Settings in the left-hand menu and specify the Destinations that your guests can choose from.

After this, go to Edit Website Content > Properties and click edit next to each property you wish to update.

Choose the relevant Destination from the drop-down box provided on each property page and remember to click save.

Preview your website and test the Property Search Widget which appears in the header area of your website.