What can I do if Labels aren't appearing on my posts ?

Labels should appear on your posts automatically if you're using any of a default templates. With Classic Templates, labels are inserted into the posts themselves, so no template modifications are necessary. If  you're using Layouts, you may need to double check that you haven't accidentally removed the labels from your layout. Here's how:

1. Go to the Design | Page Elements tab, or just click the Layout link on your Dashboard.
2. Click the Add a Widget link on the "Blog Posts" widget.
3. Then the screenshot will appear, scroll down to see the Label and click the "+" button to add. if you want to edit Label follow step below:
1. Go to the Design | Page Elements tab, or just click the Layout link on your Dashboard.
2. Below the Add a Widget you will see the label that you have created and beside it you can click " Edit" to edit your Label.
3. In the configuration window, you'll see an option to display the labels with each post. You can change the text used for this if you like, but the most important part is to have this option checked.
4. Save your changes, and view your blog to see your labels.

If you've edited your layout extensively in Edit HTML view, or if you're using a layout that wasn't provided by Blogger, then the above steps may not work. In this case, we recommend either switching to a default Blogger layout, or consulting with the designer of your template to solve the problem.