How I can pre-populate a webform field with the node title and node link? In some page I have inserted a link "Contact me for info" that links to a webform page.
I would that some fields of the webform form are be pre-populated with the node title and node link from the previous page.
How I do it?
Use the PrePopulate module and Tokens to build dynamic links on your pages. When clicked, the link's content will be entered into those fields automatically.

https://www.drupal.org/project/prepopulate

There's an example on the project page.