What is pixiv Sketch?

What is pixiv Sketch?

• How do I prevent age-restricted creations from displaying?
• Why are there blurred images? Can the blur be removed?
• What are the recommend specs and/or browsers?
• Where can I change my notification settings?
• Can I change my announcement notifications settings?
• Can I block other users?

Terminology

• What is my wall?
• What are creations?
• What are redraws?
• What are Replies?
• What is a Resnap?
• What is following? What are followers?