If Shopify traffic has plateaued for months, outsourcing SEO may help - but...

https://sticky-wiki.win/index.php/What_Should_Stay_In-House_vs._Be_Outsourced_for_Shopify_SEO%3F

If Shopify traffic has plateaued for months, outsourcing SEO may help - but only if the work fits your needs. Before hiring, ask for Search Console non-branded traffic or organic revenue results, not promises of quick wins