Full Answer

GTM hosting and GTM configuration are separate concerns, and confusing them is common. Stape and Taggrs solve the hosting problem — they provision Google Cloud App Engine instances or equivalent infrastructure, handle auto-scaling during traffic spikes, manage SSL certificates for your tracking subdomain, and monitor uptime. That is genuine value for stores that do not want to manage cloud infrastructure themselves.

The configuration problem remains entirely yours. Inside the GTM server container, you need a GA4 tag with Measurement Protocol settings and the correct client_id handling. You need a Facebook CAPI tag with SHA256 hashing for email, phone, and name fields, event_id generation for deduplication, and the correct payload format. You need a Google Ads Enhanced Conversions tag with the right conversion action ID and customer data mapping. Each tag needs triggers that fire only for the correct events. Each needs variables that extract the right data from the incoming request.

When something breaks — a Facebook CAPI tag stops sending events, Google Ads shows zero conversions, or BigQuery writes fail silently — debugging requires understanding GTM's server container preview mode, inspecting incoming requests, and tracing data flow through the container. This is specialised knowledge that most WordPress developers and store owners do not have.

The result is an ongoing dependency on a GTM specialist for every configuration change, every destination API update, and every debugging session. The hosting provider ensures the server stays online. The developer ensures the server does something useful.