SEO optimization is important to ensure you can maximize ranking potential and drive traffic to your website from search engines. You can continue to build on your strong position through further application of SEO strategies like content generation and link building.
Speed no longer just affects just your conversion rate, but it also affects how high your site will rank in search engines. If you want to rank well you have to have a site that loads fast. This is especially important on mobile as mobile search results are ranked independantly.
Cheap outsourced writing tends to be fairly repetitive because the writers are paid by the word with no incentive to trim the fat, and no incentive to do deep research. Google's leaked guidelines rate low-information & repetitive content poorly.
It is important to know how many people you are reaching via your Social Media pages. Plus social media also is beneficial for SEO, so having all your profiles connected and set up on your website is wise.
Mobile is dominating internet traffic usage, it makes sense to make sure your website is mobile friendly. Mobile-friendliness is a crucial factor in determining your online success. So it is important to ensure that your website passes the mobile friendly test.