Is 144Hz worth it on a 1080p 24-inch monitor?

Yes, if you care about smoothness. The 144Hz panel makes scrolling, cursor movement and fast games noticeably smoother than a 60Hz screen. The trade-off is that 1080p at 24 inches is sharp enough for work but not as crisp as higher-resolution panels.

Can I use it with a laptop?

Yes, through HDMI if your laptop has an HDMI port. Many thin laptops only have USB-C, so you may need a USB-C to HDMI adapter. VGA is there for older desktops.

Does it have built-in speakers?

The listed specs do not mention speakers. Plan on using headphones or external speakers connected to your computer.

Is the IPS/PLS panel good for office work?

Yes. IPS/PLS panels keep colors and brightness stable when you view from an angle, which helps with documents and spreadsheets. The 144Hz refresh rate also makes scrolling easier on the eyes.

Can I mount it on a monitor arm?

The specs do not list VESA mounting holes. Check the back of the unit before buying an arm; otherwise you are limited to the included stand.

Does it support G-Sync or FreeSync?

The specs do not list adaptive sync support. You still get the 144Hz refresh rate, but expect some screen tearing in games unless you cap the frame rate.