Use a SSL
SSL stands for Secure Sockets Layer and is now an essential addition to all website hosting and technical SEO. Since 2014 Google has favoured websites that have SSL certficate (https://) installed. Make sure your website has it in place.
Broken redirects are redirects that generate errors (such as 404s) or are pointing to the wrong place. This normally happens when a business redesigns or does maintenance on their website. The old Urls still hold authority and it is essential that these are now pointed to the new Urls. If this task is not carried out, there is a good chance of a drop in rankings and traffic.