How to show a widget on specific page? [WordPress]

A week ago, my friend asked me how to show a widget on homepage only. So today, I decide to post about this.

And here's the simple guide :

• Go to "Plugins" menu
• Install plugin "display widget"
• Activate the plugin
• on the "Widgets" menu, click options panel for the widget you would like to modify.
• Select "Show on Checked' or 'Hide on Checked' from the dropdown and tick the boxes.
  eq: If you want to create a widget that show only on homepage; you can choose Show on checked, and then tick frontpage box.

I've been using this plugin for years. I hope these tips may be useful as well for you.
And like I said in the title, this tips only for wordpress custom domain.