Windows on its own (Win+P and Display settings)
Windows can already do all of this. Win+P flips between Duplicate and Extend, and Display settings lets you arrange monitors and choose a primary. It is free, it is on every machine, and for a technical person at a fixed desk it is perfectly fine. The trouble is hot-desking: every morning it is back to Duplicate, the saved arrangement rarely matches the desk you are actually sitting at, and a non-technical member of staff has to remember which panel does what, in a hurry, often just before a meeting. ScreenSwytch drives the same Windows display APIs underneath, so it is exactly as compatible, but it wraps them in a click or two and works the layout out for the person.
DisplayLink hot-desking
DisplayLink's hot-desking feature is genuinely clever: plug into the dock and your monitor arrangement comes back automatically. If your whole estate is standardised on DisplayLink docks, it is well worth a look. That is also the catch. It only works with docks built on the DisplayLink chipset, running the right DisplayLink drivers and software, and each desk needs provisioning. ScreenSwytch is dock-agnostic: because it uses Windows' own display APIs rather than a particular chipset, it works with whatever dock happens to be on the desk, and there is nothing to provision per desk.
Free and open-source profile switchers
Tools like Monitor Profile Switcher, DisplayProfileManager, Multi-Screen Profile Switcher and NirSoft's MultiMonitorTool are free, and for a confident, technical user they are handy. They work by saving a display profile and replaying it later. That is the limitation for hot-desking: someone has to pre-save a profile for each situation, and a replayed profile falls over when the desk, the monitors or their order differ from the one that was saved, which at a hot desk is most of the time. They are also built for enthusiasts rather than for someone who just wants their screens to work, and there is no silent estate deployment or licensing behind them.
Commercial power tools (DisplayFusion, UltraMon)
DisplayFusion and UltraMon are excellent, mature power-user suites: multi-monitor taskbars, window management, wallpapers, hotkeys, the lot. If you are a power user who wants to tune everything, they are hard to beat. For ordinary hot-desk staff they are the opposite of what is needed, a large, feature-dense app to learn when all someone wants is the right screens in the right order. They are sold as one-off per-user products and are not positioned for silent Intune rollout across an estate with per-seat tracking.