Businesses of all sizes—bloggers, SMBs, eCommerce companies, large enterprises, and more—understand the importance of having a website. Without it, a business is relegated to the more time – and labor – intensive (and not to mention outdated) method of increasing brand recognition and converting leads through cold calling and word-of-mouth. Plus, if your brand doesn’t have a website, you’re relying on customer reviews on sites like Yelp, Glassdoor, social media, and others to dictate how consumers should feel about you. You don’t want to do that.

Source: Privacy Checklist: 10 Tips for Protecting Visitors to Your WordPress Site

WordPress uses MySQL, an open source database management system, to store and retrieve all of your website’s information, from the content of your posts and pages to your comments, usernames and passwords. If you need to visualize it, think of your site’s database as a filing cabinet and MySQL as the company that made it. MySQL is a popular choice of database for web applications – Joomla! and Drupal also use it, and according to Wikipedia lots of high-profile companies like Google, Facebook, Twitter, Flickr and YouTube use it, too.

Source: MySQL and WordPress: Understanding How Databases Work

Do you know who is visiting your website? And, more importantly, does the demographic of your visitors even matter? For some businesses and bloggers, that answer is a resounding: YES. If you’re reading this, you probably have (or need to implement) an age requirement restriction for visitors to your site. There are a variety of reasons for needing to restrict access to your content, but there are only a handful of ways you can go about enforcing this.

Source: How to Add Adults-Only Age Verification to Your WordPress Site

There sure is a lot you need to remember when working with WordPress theme files. From the names of basic template files to functions and how the WordPress Loop works, it’s next to impossible to remember every PHP tag or even how to define a new theme.

Source: WordPress Developer Super Cheat Sheet