Non-informative ads are mainly used to create irrational desire. Enforcing brand loyalty is a side effect - less commonly the main goal - that comes easily, as

Non-informative ads are mainly used to create irrational desire. Enforcing brand loyalty is a side effect - less commonly the main goal - that comes easily, as the human mind loves being right and will actively look for evidence to support that view (seeking praise for products that it has bought).