As a local user and a bit of a skeptic, I can tell you that Google Display Ads can seem overly complicated at first. But let’s see if I can break down its three main objectives in terms of marketing:

1. Increasing Brand Awareness – With Google Display Ads, your ads can appear in varied places on the internet, not just in Google search results. These ads can be eye-catching with images, colors, or even motion, which can be a good way to grab attention and raise awareness of your brand.

2. Boosting Engagement – The interactive nature of display ads can effectively secure the engagement of users. With various forms and types of display ads (like video and rich media), Google aims at encouraging users to interact with the ads, hence creating engagement.

3. Driving Conversions – On top of raising brand awareness and engagement, Google Display Ads can be designed to attract clicks, generate leads, or initiate sales. Different targeting methods ensure you can reach the right audience who are more likely to convert.

Now this doesn’t happen overnight, it requires A/B testing, a clear understanding of your target audience and tweaking your strategy as per results. As with any advertising platform, it’s all about leveraging its features correctly.