TV series, video games and movies are age-rated based on content, much like many other countries and regions in the world.
Grennia uses a unique system of ratings for all media content.

E 3+ is generally only for educational media targeted at young children.

G 6+ is generally for any media deemed acceptable and largely nonviolent.

PG 10+ is generally for some mild violence, but no blood/gore and no references to sexual activity.
Also the minimum age for online play and in-game purchases.

T 13+ may contain references to swearing, blood, violence, alcohol, smoking, illegal drugs, and serious crime. Minimum age for "loot box" mechanics.
No sexual activity is allowed.

M 16+ contains references to swearing, sexual activity, gory violence, alcohol, smoking, illegal drugs, and serious crime.
Requires age identification to purchase.

A 18+ contains sexual scenes, gory violence, alcohol, smoking, illegal drugs, and serious crime. Gambling with real money is allowed past this stage.
Requires age identification to purchase.

Rating Pending means the media has not received a rating but will have one upon release.