Looker Studio is a blank canvas, which cuts both ways
For an ecommerce brand, Looker Studio is the free way to report on Google's side of the business: GA4 traffic and conversions, Search Console queries, YouTube, and whatever the team tracks in Sheets. It is flexible enough to build any layout and cheap enough to share with an agency, a board, or investors.
But a canvas is all it is. Shopify orders, Meta Ads spend, and Klaviyo data have to come in through paid partner connectors, typically billed at $20 to $50 a month per source, and attribution has to be modeled by hand in calculated fields. Brands end up building a homemade version of an ecommerce dashboard and maintaining it themselves.