extraETF does not appear to have a direct presence in the provided search results, but based on the context of ETFs and financial services, it likely involves exchange-traded funds (ETFs). Typically, companies in this space offer investment products and services related to ETFs, targeting individual and institutional investors. Their unique selling proposition might involve specialized ETF offerings or innovative investment strategies. Without specific details, it's challenging to pinpoint their exact services or target audience. For precise information, visiting their website or LinkedIn page would be necessary.