How to Visualize Brand Share of Voice (SOV) in Google Slides Using a Stream Graph
April 15, 2026
Ever tried to plot brand mentions for five different competitors over a 12-month period using a standard line chart?
Yeah. It usually looks like a tangled plate of colorful spaghetti. By the time you put it on the projector, nobody in your marketing meeting can actually read it.
Share of Voice (SOV) is a massive indicator of your brand's health. It tells you exactly how much of the market conversation you own compared to your rivals. But presenting this data effectively is surprisingly difficult.
If you want your leadership team to instantly grasp market shifts, you need to ditch the line charts and start using a stream graph.
Why a Stream Graph is Perfect for SOV
A stream graph is essentially a modified stacked area chart. Instead of sitting flat on a straight x-axis, the data is centered around a horizontal baseline, creating a flowing, river-like organic shape.
Here is why it works so well for Share of Voice:
- It highlights volume changes. The total thickness of the "river" shows the overall industry conversation volume at any given time. If a viral trend hits your niche, the whole river gets wider.
- It reveals relative share. The individual colored bands show each brand's slice of that conversation. You can literally see your brand squeezing out a competitor.
- It reduces clutter. Because the lines curve and flow smoothly, the eye naturally follows the trends without getting lost in intersecting data points.
The Problem with Google Slides
There is just one annoying hurdle. Google Slides doesn't have a native stream graph option.
If you want one, you usually have to build it in an external analytics tool, take a screenshot, and paste it onto your slide. It looks great until next month's reporting meeting rolls around. When the data changes, you have to dig up the original file, update it, take a new screenshot, and replace the old one. It is a massive waste of time.
This is exactly why we rely on ExtraChart.
ExtraChart is a Google Slides add-on that lets you build advanced visualizations right inside your presentation. And yes, it has a built-in stream graph maker.
How to Build a SOV Stream Graph in ExtraChart
Creating a professional stream graph takes about two minutes. Here is my exact workflow.
1. Launch the Add-on
Open your presentation. Head up to Extensions > ExtraChart > Create & Edit Charts. The sidebar will slide open on the right side of your screen.
2. Select the Stream Graph
Scroll through the chart options and click the Stream Graph icon.
This immediately opens a popup editor with a live preview. No switching tabs required.
3. Drop in Your SOV Data
Click over to the Data tab. You'll see a simple, familiar spreadsheet interface.
You don't need to manually type everything out. I usually just copy my monthly mention volume or search traffic directly from Google Sheets and paste it right into the ExtraChart editor.
Set your dates (or months) as the columns and your competitors as the rows. The preview on the left will update instantly.
4. Color Code by Brand
This step is my favorite. If you're presenting to executives, you want the visualization to be instantly recognizable.
In the Settings tab, use ExtraChart’s Color Palette Manager. I always map the colors to match the actual brand guidelines of the competitors. If you're tracking Coca-Cola vs. Pepsi, make sure the Coke stream is red and the Pepsi stream is blue. You can save these custom hex codes as a palette in ExtraChart so you never have to look them up again.
5. Insert and Update Later
Hit "Create." The add-on drops a high-resolution, perfectly crisp image of your stream graph right onto the slide.
Now, for the best part.
When next month rolls around and you need to update your SOV report, you don't need to start over. Just click the chart on your slide, open ExtraChart, and the editor will reload your exact data and settings. Add the new month's column, click update, and you're done.
Better Data Deserves Better Design
Your Share of Voice data is too valuable to hide inside a confusing line chart. By upgrading to a stream graph, you give your team a clear, intuitive look at exactly who is winning the market conversation.
Give it a try in your next quarterly review. Just be prepared for someone to ask exactly how you made it.