system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: What is the difference between selecting debit or credit on the same checking account card when making store purchases?
gpt
Debit purchases are "online" purchases. The transaction will rather immediately be processed from your account. 

Credit purchases are "offline" purchases. The transaction will be processed whenever the business processes their credit transactions. Typically every 2-3 business days.