You might have noticed that the default title for your blogger pages is the name of your blog itself. The disadvantage of using the default settings is that you will see the same title for all your posts. So if a user bookmarks any of your posts, he will see the blog name as the bookmark instead of the post title. This can also have a negative impact on search results as priority will be given to your blog name rather than what you post. You can easily modify the template to make the title change dynamically according to your posts, which is explained in this post.