Top 8 Reasons for the Decline in Website Traffic 1. A drop in website traffic can indicate issues with a product's performance, growth, and overall revenue. Regular monitoring of traffic sources is important to identify potential problems. 2. Common reasons for declining traffic include changes to a website's design impacting load times, over-optimizing content which can lead to filtering as spam, and adding plugins that cause de-indexing from search engines. 3. To address declining traffic, the source of the drop (organic, paid, or direct), landing pages, and devices used should be examined to perform a targeted analysis and solution. Checking for viruses is also important to ensure a site is not blacklisted.