I'm going to redact all the links as it's too close to being spam with the links.
Goggle up the W3C Validation Service. Example report:
Also use this tool: https://gtmetrix.com/
As you can see, many errors there. Could affect SEO and more.
Hey, I work for a web design company and we need to make sure we don't have any errors on our websites. Here are a couple of the websites we need reviewed:
Moderator Note: Links removed as they are not required for the discussion.