Google which had introduced +1 for search & websites will soon be introducing +1 for display ads. +1 will appear for adsense for content & adsense for Mobile Content display ad formats like image, gif and Flash. This will help users to endorse ads & that would also appear in their friends profiles. This will finally herald a new step in the display ads. By clicking on these, it will not be counted as clicks for ads. Stats about the clicks would also be available & this would help them customize the ads better. If +1 button's adoption increases, it will become an important parameter of ad's popularity & quality.
Facebook's like, twitter's follow & google's +1 are the leading buttons for social networking & sharing. Family members & friends play an important role in decision making for products & services. By using +1 buttons & ads appearing in their social connections, it will influence the decision making process.