(As you may or may not be able to tell, I tried very hard to not include any spoilers.)
Attack on Titan is the best anime I have ever watched. The main character of this anime is Eren Yeager. He is a determined but reckless boy that I would personally describe as stupid. Eren experiences a lot of trauma.
The anime is about titans. Titans are basically giant humans with strange traits. They eat regular humans. On the island, there are three walls that help to protect humans from those titans. Thos walls are Wall Maria, Wall Sina and Wall Rose.
The military consists of 3 regiments. The Garrisons, who protect the walls. The Scouts, who explore outside the walls and are most involved in titan combat and the Military Police, who work within the walls, maintain order and protect the king.
Some other important characters in the anime include Mikasa, whom Eren saved when he was younger, and Armin, a feminine-looking boy whom really wanted to see the sea.
I really enjoyed Attack on Titan. Although I don't think the anime is finished yet, I can say that it is very enjoyable. It has an exciting plot, interesting characters and has really sound effects. On top of that, the songs are extremely catchy and nice. Although it's a really good anime (in my opinion), I do not think it's suitable for younger viewers as it does have quite some gore, violence and extremely mild s3xual themes. Because if this, I would rate it as a 13+ show. Once again, I really enjoyed it and I hope that you enjoy it too if you decide to watch it.
Thank you for for taking the time to read this and I hope this helps. Happy watching if you do decide to watch it! :)