highroll_dnKlBeen reading this board for a while, thought I would drop what I look at before signing up anywhere. After trying maybe a dozen sites I stopped trusting the big banners.
Licence comes first for me: see which authority is listed in the footer, and whether they actually accept players from your country. After that I look at banking: card, e-wallets and bank transfer should all be there, and the withdrawal limits need to be written clearly.
Bonuses are the tricky part. 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 [url=https://www.tumblr.com/soldkryptohub/829804851213090816]Smash Casino[/url] and it saved me some time.
I play almost only on my phone, and if there is an app I make sure it comes from the official page. Ask support one simple question first: a real human reply beats a bot loop.
That is about it. Treat it as entertainment, not income.