The contents of the field do not appear in public view

I have not built the website and I am new to Drupal.

I was asked to add a new field to an existing content type. I added the field and it appears on the form for this type of content, but the data entered in the form does not seem to be passed to the public view.

The site is Drupal 7 & uses Views. I do not think that it is the module of the views which poses problem, although I played a lot with it and that I especially learned how it works. The reason I do not think it's the views module is that when I look at the page with the tabs "Show" "Edit", it does not appear either.