Steps To Add Cookie Consent Warning To Your Blogger Blog
First, go to your Blogger dashboard. In the left panel, you can find several options. Choose Layout.
Now, choose Add A gadget from a preferred sidebar.
A new window will pop up. It contains the entire list of Gadgets, that you can add. Scroll down and choose HTML/Java Script. Tap on the plus sign.
Now, you can search online for any service which creates customized cookie consent plan. There are options for free and paid services. Choose one. I have chosen elfsight.com for my blog. I tried the Lite version. You can customize the consent format according to your requirement.
Now, it is done. This is how the Cookie consent widget will appear. Here, I have tried with a free version. For most free versions, there will be a watermark of the company whose service you have chosen. You can opt to use their paid service or simply use the free service, if you are not bothered with their logo.