Engagement means many things to many people.  Quantifying engagement online is up to you, your team, and the way your website operates. (Teams might use time on site, pages per visit, conversions, or something else entirely.)  But whatever metrics you use to define success online, there are some truths we hold self-evident in online marketing — for instance, if your website is down, nobody is being engaged.  This list is based on those fundamental truths.  Use this checklist to find out where your site stands among techniques and stats that are guaranteed to improve engagement, regardless what metrics you use.