Adds to a counter each time the template is shown. It shows nothing. Read the count with {jrCore_get_count}.
{jrCore_counter module="jrProfile" item_id=$_profile_id name="profile_view"}Skins count profile views this way, in the profile footer. The count is stored with the item as (name)_count, such as profile_view_count, so it can be used in {jrCore_list} searches and ordering.