Assembling product review data proxy workflows starts with an honest inventory of where customers and users actually talk about your products and competitors, then translating that map into concrete collection strategies that the proxy layer can support at scale. App stores, major ecommerce platforms, vertical marketplaces, trust and comparison sites, social review widgets, B2B software directories and even support community forums all host reviews with different formats, access paths and rate limit expectations, so the first step is to classify them by channel type and by criticality for your use cases. For each source family, you define entry points such as product IDs, SKU lists, package names or category URLs, along with navigation rules for pagination, sorting and historical backfill so that the proxy orchestrator knows how to walk the surface safely and exhaustively. Language coverage requirements, for example support in English, Spanish, Portuguese, German, Japanese or Arabic, drive routing decisions and header templates so that the same product is observed as local customers see it in different regions, not just via a single default locale. A historical backfill plan describes how far back to go per source and per product line, balancing the need for longitudinal trend analysis against cost and diminishing relevance of very old reviews; the proxy layer enforces these limits by tagging and throttling older pages differently from fresh ones. All captured payloads, whether HTML, JSON or API responses, are immediately normalised into a unified review schema, linked to canonical product and company identifiers, and written into storage systems designed for analytical workloads, with rich metadata about crawl time, route, locale and parsing status so downstream teams can debug anomalies and refine coverage without guessing how a particular review entered the system