Strictly necessary. Required for the site to work. They maintain your session, balance load across servers, remember your cookie choices and protect forms against cross-site request forgery. These cannot be switched off through our banner because the site cannot function without them.
Preferences. Remember choices you make so the site behaves consistently. On this site they store the theme colour scheme you picked in a demo page and dismissals of informational notices. Blocking them means your preferences reset on every visit.
Analytics. Help us understand which demo pages are viewed, how visitors move between them, and where layouts cause confusion. The data is aggregated and used to improve the themes. Blocking them has no effect on how the site works for you.
Marketing. Used to measure whether a campaign led to a visit and to avoid showing the same message repeatedly. We keep these to a minimum and set them only with your consent.