I have a client who has added a live chat script just before his /body tag. The live chat script uses WebSockets for communication with servers. However, it appears his SEO traffic decreased by a good margin after the addition. Can live chat script be the reason it happened?
I understand that the question finally drills down to 'Does script tag affect SEO?' but was trying to give as much context as possible.
This appears to have happened in first week of January. If the above is not the reason, have there been any changes to Google ranking algorithms recently?