The word pixel is a portmanteau of the words picture and element. Sometimes abbreviated as “px”, a pixel is the smallest possible unit of an image displayed on a digital screen
The word pixel is a portmanteau of the words picture and element. Sometimes abbreviated as “px”, a pixel is the smallest possible unit of an image displayed on a digital screen. They’re the small, colored squares that blend together to make up the images you see on your computer screen or mobile device.
Pixels are an important technical aspect of digital creative, especially when it comes to designing websites that follow modern web design best practices. Web designers leverage their technical understanding of pixels to build responsive websites that scale automatically to fit the user’s device, regardless of screen size or display resolution.
Digital displays like computer monitors, mobile phones, and tablets use pixels and the RGB color model to represent images on a digital screen. RGB is an additive color model where the light source within the display device creates the desired color by mixing red, green, and blue, and varying their intensity.
An RGB display is made up of millions of pixels. When it’s time to display an image, each of those pixels receives a small segment of binary code that tells it how to display a certain color. When every pixel is displaying the right color, the colors blend together and the bigger picture becomes discernible for users.
Here’s what you need to know about how pixels work:
A pixel is a logical unit – not a physical unit – so there is no standard size for the pixels that make up a digital display. Different digital products implement pixels in different sizes, though they are ordinarily square or rectangular in shape.
In an RGB display, each pixel has red, blue, and green color elements. Each of these color elements can be expressed at a different intensity (also called saturation), from 0 (least saturated) to 255 (most saturated).
By combining different saturation levels of these three color elements, a pixel can be made to represent over 16 million different colors.
The pixels on a typical digital display are arranged in a grid, with rows of pixels from left to right and columns of pixels from top to bottom. Every pixel in the grid has its own unique address or coordinates. This address is used to transmit the code that determines which color the pixel should display.
A digital camera takes pictures by focusing light on a silicon sensor. This sensor consists of a grid of light-sensitive photosites known as pixels. When you snap a photo, the sensor measures the color and brightness of each pixel and stores it as a number.
Thus, a digital photograph is really just a long string of numbers with the address and color information for every pixel needed to reconstruct the image.
ScalixAI is a performance-driven Google Ads agency specializing in helping high-growth, AI-first companies scale with predictable, profitable customer acquisition. Founded by an ex-Googler with 9 years of insider advertising experience, we manage the entire Google Ads lifecycle—from campaign strategy and account setup to conversion tracking, analytics, and ongoing optimization. Our data-centric, AI-powered approach ensures you know exactly which campaigns are working, why they’re working, and what to do next to outpace your competitors.ScalixAI is a performance-driven Google Ads agency specializing in helping high-growth, AI-first companies scale with predictable, profitable customer acquisition. Founded by an ex-Googler with 9 years of insider advertising experience, we manage the entire Google Ads lifecycle—from campaign strategy and account setup to conversion tracking, analytics, and ongoing optimization.
Most clients see performance stabilize by month three. Google Ads isn’t a slot machine—it takes time to compound.
No. We work month-to-month. All we ask is that you give us three months to prove the results.
While Google Ads is our entry point, we also support LinkedIn Ads, Reddit, and X campaigns when needed.
The CRO audit covers your landing pages, CTAs, forms, and overall user flow. We’ll flag what’s holding back conversions and recommend fixes. If changes require design or dev resources, we’ll hand over clear action steps for your team, so you know exactly what to adjust.
As an ex-Googler, I know which recommendations are useful, and which are just there to hit Google’s internal targets. We’ll filter their advice for you, implementing only what actually helps us hit revenue goals.
Weekly reports show spend, conversions, CPL/CPA, and how we’re tracking against projections. “Good” means campaigns are meeting efficiency targets. “Scalable” means we can push budget and expect the same or better efficiency without breaking ROI.