Text Replace is a powerful WordPress plugin that allows you to replace text (inside posts, pages, custom post types etc) with some other text. It provides you quick and easy way to create shortcuts to common, lengthy, or frequently changing text, HTML or for smilies. It can be utilized to make shortcuts for frequently typed text, but always remember these things in mind.
When you run a multi-author blog then the main problem comes on your WordPress site is having different layout styles in different blog posts that makes your site look odd. This happens because of the authors who are unaware of removing HTML formatting after copy-pasting content they have written in your blog. Hence they publish undesired HTML tags in their blog posts and pages.