recently i’ve changed the Permalinks of my websites and forgot to redirect the posts. and now the articles of mine are showing in archives form on google and when someone clicks on them, they get redirected to 404 Error Page. Please help me…
Resubmit your sitemap on Google Webmaster tools. This will solve your problem. First visit your site webmaster console and check on sitemap section. Select all submitted sitemaps and Resubmit it.
Eg: Refer this Screenshot
In your case the best solution is 301 redirection.
If you don’t know what was your old permalink then go to Google search console and it will show you all 404 error pages. If you signup to search console right now, then still you can see those errors but after some days.
If you’re using some kind of CMS like Wordpress, Drupal or Joomla, then you will find lot’s of plugin which will help you to setup 301 redirection very easily.
If you’re using Blogger, then it also support 301 redirection (Go to setting > search preference > Edit custom redirects).