This is a Squarespace Blog post with a location attached to the post. Some templates show the location as a map link. Others do not use the location at all, anywhere. If you post about things that are based on their location, such as a photo journal of your travels, or a blog based on reviewing local restaurants, then you should select a template that shows the location associated with your posts - or you could try doing something fancy with Summary Blocks, like this.
In this template, the location link appears bottom left, as part of the meta data. When you click on it (Palace of Westminster), it will open a Google Map in a new window.
Of course, you can also embed a Google Map into the blog post itself, too - if you want to. Here's one I made earlier: