Ovulation test question!

Okay so I’m new to tracking my ovulation, I need serious help!

When using OPKs, and you get a positive, does that mean your egg has been released and you have 24 hours from that point to try to conceive?? What happens if you get another positive the next day, is the egg still good and you have a high chance of conceiving? Please tell me all you know ❤️