When Google makes a new move in advertising, people are bound to take notice, and it's made a fairly big one today. It's announced what it's dubbed the Brand Activate Initiative at the Ad Age Digital Conference today, something that initially consists of two new services for advertisers: Active View and Active GRP. The latter is a so-called gross rating point metric that's modeled to some extent on TV advertising, while Active View is something that Google hopes will become a standard for all online advertising. In short, it measures both how long an ad remains on a person's screen and how much of it is viewed -- if at least 50 percent of