The honest version of "does it integrate with my software." These are the systems this industry actually runs on, and what each one means for a build.
ConnectWise PSA / Autotask / HaloPSAProfessional services automation
The system of record — tickets, contracts, time, projects and invoicing. All three have real APIs and are heavily integrated with, so the ceiling here is what you decide to build rather than what you can reach.
RMMMonitoring and management
ConnectWise Automate, NinjaOne, Datto RMM or Kaseya. Generates alerts in volume, most of which are noise, which makes triage before ticket creation one of the highest-value agents available.
IT Glue / HuduDocumentation
Client environments, credentials and procedures. Only as good as how current it is, and keeping it current is the chore that always loses to billable work.
Microsoft 365 and EntraClient environments
Where most client identity and mailbox work happens. The single most common source of onboarding, offboarding and access-review work.
Backup and security toolingService delivery
Backup verification, endpoint protection and vulnerability reporting, each with its own console and its own report nobody reads until it matters.
Quoting and procurementSales
Distributor pricing and quote assembly. Margin depends on current cost, and current cost changes faster than most quote templates do.
Client communicationSupport
Email, portal and phone. Most tickets arrive as prose describing a symptom, which is exactly the thing an agent can classify and route.