Last updated: 11 August 2026
01Glossary of casino terms
Short definitions for words that appear in our comparisons. Aimed at newcomers reading UK operator sites for the first time.
- UKGC
- The UK Gambling Commission — the regulator that licenses remote gambling operators serving Great Britain.
- Wagering requirement
- How many times a bonus (and sometimes the deposit) must be staked before related winnings can be withdrawn, subject to game weighting.
- RTP
- Return to Player — a long-run theoretical percentage of stakes returned as prizes across all play, not a short-session guarantee.
- Volatility
- How a slot tends to pay: lower volatility usually means smaller, more frequent returns; higher volatility means rarer, larger swings.
- Live casino
- Real dealers streamed to your device for games such as blackjack, roulette and game shows, with digital betting interfaces.
- RNG
- Random Number Generator — software that determines outcomes in non-live digital games, subject to testing for licensed products.
- GAMSTOP
- Free UK self-exclusion service that blocks registered users from licensed online gambling for a chosen period.
- ADR
- Alternative Dispute Resolution — an independent process licensed operators must make available for eligible complaints.
- Game weighting
- The percentage of a stake that counts toward wagering; slots often count higher than table games.
- Payline
- A pattern on a slot grid where matching symbols can form a winning combination.