According to WordPress.org, WordPress is a web software that you can use to create a beautiful website or blog. The keyword in that sentence is “software” and just like other software we used in lives on a daily basis, there comes a time when they must be updated.
Picture this, your WP powered site/blog is running perfectly. Then one day you login to see a notification at the top about the new WordPress version that just release but you ignore it. Another update comes out and you ignore that as well.
There are two possible outcomes and I see this happen too often:
(A) You see that a plug-in you use needs to be update and you figure do that update instead but it break your site. You get a white screen when you go to your page and can’t even get to the login page. Or (B) Hackers take down your site.
Now with either outcome, there’s a possibility you may loose everything because you fail to keep your WordPress software updated. I also seen where people do keep their WP up to date but fail to backup before doing a major upgrade and something goes wrong. [read entire post]