In marketing, conversion killers are all factors that impair conversion. Negative factors are mistakes in the implementation of marketing measures, as well as tactical corporate and economic blunders. Conversion killers are drastic mistakes in website design and creation, marketing and search engine optimization (SEO), and company presentation on the web. Low pagespeed of the homepage, lack of Responsive Design or little relevant content are among the biggest conversion killers. From your own experience, you surely know that websites that take a long time to load and are not displayed correctly on your smartphone are not considered very trustworthy. For this reason, always make sure that the basics of your website are always optimized and that you provide your users with meaningful, informative content with added value. Then it also works with the conversions