If Shopify traffic has plateaued for months, outsourcing SEO may help - but...
https://delta-wiki.win/index.php/How_Do_I_Know_If_My_SEO_Agency_Is_Actually_Moving_the_Needle%3F
If Shopify traffic has plateaued for months, outsourcing SEO may help - but only if the work fits the bottleneck. Ask for Search Console non-branded traffic, a clear diagnosis, and what changes they will own - not promises.