Demand Gen Image and Video Creative Specs: A Complete Guide

To succeed with Demand Gen campaigns, you must provide a variety of image aspect ratios to accommodate different inventory spaces. Google accepts square, landscape, and vertical images to ensure your brand appears naturally within user feeds. When preparing your assets, prioritize high-quality photography and clear branding that remains legible on smaller mobile screens. Avoid cluttered compositions, as these often fail to grab attention when users scroll quickly through the Discover feed or check their Gmail promotions tab.

For square images, use a 1:1 ratio, which is the most versatile format for these campaigns. Landscape images require a 1.91:1 ratio, often used for horizontal placements that appear within news-heavy environments. Vertical images, set to a 4:5 or 9:16 ratio, are increasingly relevant for mobile-first experiences like YouTube Shorts. Always ensure your file sizes remain under the platform’s limit, typically around 5MB, and use standard formats like JPG or PNG to avoid compatibility errors during the upload process in Google Ads.

Video content serves as the backbone of high-performing Demand Gen campaigns, particularly when targeting placements like YouTube Shorts. Much like images, your videos must be available in multiple aspect ratios to cover the full range of Google inventory. Ensure your primary video assets are uploaded in 16:9 for landscape, 9:16 for vertical, and 1:1 for square formats. This flexibility allows the system to mix and match your creative based on the specific user journey and device context.

Consider the pacing of your video content to maximize engagement. Since many users interact with YouTube Shorts in a rapid-fire manner, your brand identity should be established within the first three seconds. Avoid heavy reliance on audio-only cues, as many users browse their feeds with the sound muted. Instead, use on-screen text overlays to convey your primary value proposition or call to action. Testing different versions of your video—such as one featuring a human narrator versus one using motion graphics—can help you identify which style resonates best with your specific audience segments.

In a typical account, the Google algorithm performs better when provided with a diverse set of creative options. If you only upload one aspect ratio, you limit the number of inventory slots your ads can occupy. By providing both square and vertical assets, you ensure your ads appear in the highly engaged YouTube Shorts feed while also maintaining visibility in the Gmail promotions tab. This multi-format approach is essential for maintaining a consistent presence throughout the entire consumer funnel.

Furthermore, variety allows for better performance data collection. When you run multiple creative assets, the system learns which visuals drive the highest conversion rates for your specific industry. If you sell home office furniture, for example, a lifestyle photo might outperform a product-focused graphic in Discover, while a short video demonstration might drive more clicks in YouTube Shorts. Review your asset report regularly to see which combinations yield the best results and rotate your underperforming assets accordingly.

At Alien Road, we follow a rigorous process to ensure every client campaign is optimized for the Google ecosystem. We begin by auditing the client’s existing asset library to identify gaps in aspect ratio coverage. For a typical engagement, we might find that a client has excellent landscape video but lacks the 9:16 vertical versions necessary for YouTube Shorts. We then coordinate with the production team to reformat or create new assets, ensuring the core message remains intact across all dimensions.

Once the assets are uploaded, we monitor the ‘Ad Strength’ indicator in the Google Ads panel to ensure we are providing the right mix of headlines, descriptions, and visuals. We don’t just set and forget; we continuously analyze the performance data to suggest new creative iterations. By focusing on the intersection of technical compliance and high-quality storytelling, we help clients maintain steady performance without wasting budget on ineffective or improperly sized creative assets.

A common mistake is using low-resolution images that become blurry when scaled up for larger screens. Always aim for the highest resolution possible while keeping the file size under the limit. Another frequent error is including critical text or logos too close to the edges of the image. When these ads appear in different placements, the edges may be cropped, leading to cut-off text or missing brand logos that confuse the viewer.

Additionally, neglecting to test different calls to action (CTAs) within your creative is a missed opportunity. While the platform allows you to select a button, incorporating a subtle visual cue inside your image or video can reinforce the desired user action. Ensure your landing page matches the promise made in your creative. If your ad highlights a specific discount, that discount should be immediately visible upon clicking the ad, rather than hidden deep within your website.