Which systems matter in web development (CMS, CRM, ERP, analytics, payments)?

The core systems that intersect with web development are: the CMS (which determines how content is managed and published), the CRM (which captures and processes lead or customer data from the website), analytics platforms (which track user behavior and campaign performance), payment gateways (which handle transaction security and processing), and ERP or inventory systems (which may need to sync product or service data with the website in real time).

Each integration adds technical complexity and must be planned at the architecture stage. A HubSpot CRM integration requires form mapping, contact property alignment, and workflow configuration. A Razorpay or Stripe payment integration requires PCI DSS compliance considerations and webhook handling for payment confirmation. Google Analytics 4 and Google Tag Manager require a structured tagging plan to capture events accurately. Identifying all required system connections before development begins prevents mid-project scope additions that delay launch.