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Blender 2.8 How to use Transparent Textures

There are several ways to use transparent textures with Blender. Below I'll describe several of these methods.

Method 1

I think this is the most straight forward solution to use transparent textures with Blender which works great with the Eevee render engine.

Make sure that you're using the Eevee render engine.
Create a new material with the nodes as shown below.
Open the Materials panel > open the Settings group.
Now change the Blend Mode to Alpha Blend

Material Nodes:

Material Settings:

Method 2

Follow this node setup when you want to use an image with transparency as a "sticker".

Create a Texture Image node.
Connect the Texture Image node to a Mix Shader node.
Connect the alpha of the Texture Image to the factor of the Mix Shader.
Connect the color of the Texture Image to the second color input of the Mix Shader.
Set the color value for the transparent parts on the Mix Shader.
Connect the color output of the Mix Shader to the Principled BSDF.

The node setup will look something like this:

Which gives a result like:

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