?contents=1 in SharePoint

you may face issues in your web part  page anytime. So what can you do to remove the bad web part which causing trouble to your site page. You can do the following this.
1.Close Web Part
2. Delete Web part
3.Reset Web Part
4.Check out Web part.
Lets say this is your page name http://mysite/Pages/Home and you need to change this to http://mysite/Pages/Home/?contents=1. That's it web part maintenance page will opens.
Super cool features works well for both 2010 and 2013.
Happy Share Pointing :-)