More than 300 billion emails are sent every day, a staggering number. If you focus more on business-related emails, the average office worker sends 40 emails per day, and the average person receives 121 business-related emails every day. With so many emails being sent and received, is it any surprise that a lot end up in the spam folder? Email hygiene should be a primary focus if you're an email marketer or if you send regular emails as part of your job.

Search engine optimization (SEO) is the art of bringing your site higher in search engine result pages (SERPs) to increase its discoverability and competitive advantage. It involves detecting keywords that your target audience uses, publishing well-optimized content that's easy to crawl and rank for search engines and valuable to users, posting expert content on trusted sources to build credibility, and so on. Yet, technical SEO is much different.