Today, I am writing about creating a SharePoint Picture Library in SharePoint 2016 or online. Also, I will describe about what Picture Library is, and the use of Picture Library.
I will be covering the below points
So, let's start step by step.

What is a Picture Library?

As per TechNet, A Picture Library allows us to share a collection of digital photos or graphics. With the help of Picture Library, we can store pictures and share the same with team mates using share link.While photos can be stored in other types of SharePoint libraries, Picture Libraries have several advantages. We can edit these pictures from the computer. We can also easily link to photos in our Picture Library from elsewhere on our site, such as pages, wikis, and blogs.

How to create Picture Library?
How to add columns for Picture Library?
How to add or upload Picture Library?
Method 1
Method 2
Method 3

How to delete pics from Library?
Views for Picture Library

As we are working with SharePoint, Picture Library lets you upload and store photos and images that can be used in your site or shared with others. Using different Views, you can organize and see them in different ways.

By default, we can see that we will have few of the Views created for the Picture Library.