Putting your name, the title and the page number on each page can save someone a big headache. Hearing Back from the Publisher Response times vary, but generally you can expect to hear back from a publisher within 2 to 3 months. Almost every writer has seen plenty of these. It's never pleasant, but it seems to be an inevitable part of the process of getting published. Thanking an editor for considering your manuscript is a nice thing to do.
Editors appreciate and remember things like that.
Occasionally, an editor will write or call with a request to see revisions. In these cases, they may ask the author to revise the manuscript, perhaps even making suggestions. It's up to the author to decide whether to make the revisions or not. You may work hard to rewrite your manuscript, only to have it rejected in the end. On the other hand, a willingness to take editorial direction and revise your manuscript may result in a sale.