Been reading this board for a while, but I figured I would share my short checklist for choosing a casino site. After trying maybe a dozen sites I stopped going by ads alone.
I always start with licensing: see which authority is listed in the footer, because some sites quietly block certain regions. Then payments: card, e-wallets and bank transfer should all be there, and cashout times should be listed up front.
The welcome offer is where most people get caught. Read the wagering and the max bet rule, and some games count less towards it. A useful overview with bonus rules, app info and payment methods is here Trino Casino so you know what you are signing up for.
I play almost only on my phone, so I check how the lobby works on a small screen. Ask support one simple question first: if they answer in a couple of minutes that is a good sign.
Anyway, that is my routine. Set a budget and stick to it.