You can set up filters on your portal/shared view so that people can switch between different categories by clicking different buttons. These 'filters' can be existing Airtable views that are reflected in your portal, or you can set custom filters and sort conditions.
To set different predefined filters which portal users can choose from, go to:
Tables
Click on a portal table
Go to Views section.
Click on a view
Each view allows you to set a label, aiding users in recognizing the predefined filter they are using. If you prefer using an Airtable View for filtering and sorting, you can use the Airtable View name as the custom view's label.
If you're using a portal extension (i.e. your users log in to see the records), you can choose whether to display personal records only (default) or all the records in the table/Airtable view.
View selectors will only show up in the portal if more than one of them are defined. You can add more in the extension settings.