What does Gaussian Blur mean in Photoshop?

The Gaussian Blur filter quickly blurs a selection by an adjustable amount. Gaussian refers to the bell-shaped curve that Photoshop Elements generates when it applies a weighted average to the pixels. The Gaussian Blur filter adds low-frequency detail and can produce a hazy effect. You can set the blur radius in the filter options to determine how far the filter searches for dissimilar pixels to blur.

Gausian blur is an filter to use in potos for reduction noise and if you want to watch as a taturial so please visit my chaneel     https://www.youtube.com/channel/UCTz0EpBzFPP7qmS6-D_CzlQ?sub_confirmation=1

To the right of the filter name is another little icon that is perhaps the coolest contraption for filter fans to date. Double-clicking this little item opens a separate dialog box that allows you to adjust the opacity of the filter, and change the Blend Mode for the filter itself! This means you can apply the filter in Multiply, Overlay, Soft Light, et. al. and get totally different effects that, potentially, have not been available before without30 layers and a lot of experimentation! For instance, in this example I have changed the opacity of the blurred background and deepened the colors with a Multiply blend mode setting. The mask allowed me to retain the focus on the model’s face with no alteration in color or definition.

Someone new to Photoshop might be tempted to dismiss Gaussian Blur as something that makes stuff blurry. But the stalwart Gaussian Blur goes to the heart of what makes Photoshop Photoshop. The term Gaussian might be best described as the thing that makes another thing drift eventually and incrementally into oblivion. Gaussian Blur underlies the Feather command, the Drop Shadow layer effect, and even Unsharp Mask. Simply put, it is the heart of detail-, depth-, and focus-enhancement in Photoshop. To learn how, when, and where to use it, click the image below to launch the video in another window.