If an SSL certificate expires and is not renewed in time, the following may occur:
When a user visits your website, the user's browser displays a warning message indicating that the website's security certificate has expired. After receiving such a warning message, the user may lose trust in the website or choose to stop visiting the website, which has an adverse impact on the company's brand image and subscriber base.
Hackers and other cyber-criminals may take advantage of the expired SSL certificate to tamper with or steal information transmitted between the browser and server, affecting user data security.
Certificate expiration will cause unexpected business interruption, leading to operating problems and capital loss.
Certificate expiration will affect the website's SEO ranking.