Nano Banana Prompts: How to Write Them, With 18 Marketing Examples

Nano Banana prompts are the instructions you write to create or edit an image with this model, in the Gemini app or through the Gemini API, which Google documents in its image generation guide. The model is multimodal: it understands text and images together, which makes it strong at editing a photo you upload and at keeping a character or a product consistent across several images.

What is Nano Banana?

The name started as an internal codename that spread among users before Google adopted it publicly. Behind it are Google's image models in Gemini:

Model names and limits change quickly: check the Gemini app or the API documentation for the version available to you.

How do you structure a Nano Banana prompt?

The model responds best to descriptive sentences, the way you would brief a photographer or an illustrator, rather than to lists of keywords. Cover these elements:

1. Subject: who or what, with precise details (material, color, size, expression).
2. Setting: where, with a few concrete elements of the background.
3. Style: product photo, editorial photo, flat illustration, 3D render, watercolor, isometric.
4. Framing: close-up, wide shot, top view, eye level, rule of thirds, empty space for text.
5. Light and mood: soft daylight, studio light, golden hour, high contrast, cool or warm tones.
6. Text in the image: the exact words in quotation marks, the font style and where they go.
7. Format: aspect ratio (1:1, 16:9, 9:16, 4:5) for the channel where the image will be used.

For editing an existing image, upload it and write what changes and what stays: "Replace the background with a white studio wall, keep the product, its shadow and its colors unchanged." The general method of writing prompts is the same as for text; see our guide to AI prompts.

18 Nano Banana prompts for marketing

Product visuals

1. "Product photo of a matte black ceramic coffee mug on a light oak table, soft morning light from a window on the left, shallow depth of field, steam rising, minimal background, 4:5 format."
2. "Place the uploaded sneaker on a concrete step in an urban street at golden hour, keep the shoe's colors and logo exactly as they are, add a natural shadow."
3. "Flat lay seen from above of a skincare routine: three white bottles, a green leaf, a folded linen towel, on a pale beige background, even studio light, 1:1."
4. "Show the uploaded backpack worn by a hiker on a mountain trail, seen from behind, wide shot, misty peaks in the distance, realistic photo."
5. "Create four color variations of the uploaded t-shirt: navy, forest green, sand and burgundy, same angle and lighting, arranged in a 2x2 grid."

Banners and ads

6. "Wide web banner, 16:9, for a spring sale of garden furniture: a teak chair and a potted lemon tree on a sunny terrace, empty space on the right for text, bright and airy."
7. "Square social ad: the uploaded smartphone held in one hand above a café table, the text \"30-day battery\" in bold white sans-serif at the top."
8. "Vertical 9:16 story background in soft pastel gradient from peach to lavender, subtle paper texture, no text, for an announcement."
9. "Minimal illustration of a calendar and a clock merging into one icon, flat design, two colors (dark blue and orange), white background, for a scheduling app ad."

Article illustrations and thumbnails

10. "Editorial illustration for an article on remote work: a person working on a laptop in a small home office, plants, warm light, semi-flat style with soft shadows, 16:9."
11. "YouTube thumbnail, 16:9: a surprised man pointing at a rising line chart on a screen, bright yellow background, the text \"Traffic x2\" in large bold letters on the left."
12. "Isometric 3D illustration of a small online shop: a storefront, a delivery van, parcels and a smartphone showing a cart, clean pastel colors."
13. "Simple diagram-style illustration of three steps, research, write, publish, as three connected rounded boxes with icons, flat design, white background, labels in English."

People and brand consistency

14. "Using the uploaded portrait, create a professional headshot: same face and hairstyle, navy blazer, neutral grey background, soft studio light."
15. "Keep the same mascot as in the uploaded image, a round orange fox with a scarf, and show it reading a book under a tree, same style and colors."
16. "Team photo style image of five colleagues around a table in a bright office, diverse ages, natural expressions, candid documentary style."

Editing and cleanup

17. "Remove the people in the background of the uploaded photo and fill the space naturally, keep the building and the light unchanged."
18. "Turn the uploaded daytime photo of our shop front into an evening scene with warm window light and blue sky, keep the sign readable."

What are the limits of Nano Banana?

• Text rendering has improved a lot, especially with the Pro model, but long texts and small fonts can still contain errors. Check every letter.
• Faithfulness of products: logos, labels and fine details can drift. Compare with the real product before publishing.
• Real people and brands: usage policies restrict some requests, and you remain responsible for image rights and for not misleading customers.
• Watermark: images created or edited carry SynthID, an invisible watermark that identifies AI-generated content, and some versions also add a visible mark.
• Disclosure: for product images, showing a scene that the product cannot deliver can mislead buyers; keep generated images faithful to reality.

How to publish AI images so they help SEO

A generated image is a normal image for search engines. Google's guidance on image SEO best practices applies in full:

A free image compressor reduces the weight of generated files, which are often large. Our glossary entry on image optimization covers the rest of the checklist.

Nano Banana works best with prompts written like a creative brief: a precise subject, a setting, a style, a framing, a light and the exact text, plus clear instructions on what to keep when editing. Images then need the same care as any other visual: verification, honest use and image SEO, so that they help your pages rank instead of only filling space.