Technology allows companies to target advertisements to specific demographics and audiences. Various online marketing methods like web banners, social media, mobile ads, and email use technologies like images, video and text to promote products. These methods can be measured and targeted to reach intended audiences. While privacy and ad-blocking present challenges, online marketing provides benefits like low cost, measurability and ability to target specific groups. Demographic groups like teens, seniors and baby boomers are increasingly using technologies and social media, making them important targets for online advertising.