a) Something is set in the field Leo mentioned.
b) Your content is longer than your excerpt length
c) The content is set to display the excerpt and not full post (unless the more tag is used).
Make sure these 3 things in Customizer > Blog > Blog Content
– Set Blog Post Content to Show excerpt
– Make sure the content is longer than whatever you’ve set in Excerpt Length
– Make sure something is entered in Read more label
Now, I see the read more label. But i dont understand how to works because the excerpt that i have wrote on post not displays. The blog show de content with longer as configurate in Blog Content.