Once you have tags and some tagged items you can display portfolio in the front end in several ways.

1. Using Menu Manager you can create a menu link that displays portfolio items.
2. You can use SP Simple Portfolio module.

 Each new menu item in Menu Manager include settings which can help you customize appearance of portfolio view.

• Show Filters - Enable or Disable showing filter buttons. Filter option can display a list of items that have a exactly this same tag to the currently clicked tag.
• Grid Layout Settings - select from Default, Gallery with or without space between images.
• Columns - select number of columns per row (2, 3 or 4).
• Thumbnail Size - select from Square, Rectangular shape or Masonry style.
• Items per page - enter the number, in most cases number 12 is optimal.