Services that either facilitate a constant flow of information from one web service to another, or to trigger off of events on various websites:

• If This Then That (IFTTT) — trigger off of events on various web services
• Zapier — automate data flowing from one web service to another
• Microsoft Power Automate
• UiPath
• Integromat
• Automate.io
• Zoho Flow
• (other iPaaSs — Integration platform as a service)