If you're a new member, or even if you're a long standing member, I highly recommend you watch this webinar which will help you understand many aspects of your ISC2 membership:
Guide to your (ISC)² Membership in EMEA: Benefits, Maintenance & Opportunities
While it is EMEA specific, the advice is mostly the same for all regions. The differences being the regional contact details and the benefits available per region - the specific details for your own region can be found in the main member portal.
So many of the questions I see being repeated over and over here on the Community from different members are covered off by the information you will learn from watching this - plus, as a bonus, watching it will earn you 1 Group B CPE.