Why browser games still make sense
No installation, no launcher, no storage cost, and an account that follows you between machines. For anyone on a shared or work-managed computer, that alone settles the question.
The trade-off is presentation. Browser titles generally look plainer than downloadable clients, and they lean on systems rather than spectacle.
What to check before committing
Look at whether the game runs in a single tab without a plugin, whether it holds up when the tab is backgrounded, and whether there is a mobile browser layout if you expect to check in from a phone.
Persistent-world browser strategy such as KingsAge asks for regular short visits rather than long sittings, so consider whether that fits your week before you join a competitive world.