Plugins, just like any other software, must be upgraded periodically. When a new release of the plugin is announced and is available, you should upgrade the plugin. Most of them usually upgrade to cover a security hole or to add more options in the plugin. For safety reasons, is very important to keep your plugins always updated in the latest edition.
How do I know if one of my Plugins needs upgrading?
First of all, you need to sign in to the WordPress Dashboard of your site.
If any of your Plugins needs upgrading, next to the Plugins option in the WordPress Dashboard menu, you will see a number, as shown in the following figure:
How I update my Plugins??
Go now on Plugins page. As you can see, next to the section Update Available, there is the number 1. This means that there is an update available for one of your Plugins.
As we can see in our example, there is an update available for the Akismet Plugin.
If you want to update this Plugin to the latest version, click link update now. The WordPress will download automatically the information, then will install the plugin and will remove any junk files from the previous installation.
After pressing the update now and update is completed, you should now see this image:
