The document discusses critical discourse analysis and how images are encoded and decoded in advertisements. It analyzes six advertisements - two product ads and four non-product ads - using Fairclough's three dimensional model and Kress and van Leeuwen's grammar of visual design. The analysis finds that most producers try to position the viewer as powerful by giving them the choice, likely to encourage selection. When the producer is the government, they aim to show power over people, implying the powerful should assert authority for obedience.