Hello Marius,

The use or non-use of the keywords meta tag is still a controversial subject after many years.  It is almost certain that meta keywords no longer help a website ranking, but what is less clear is whether or not they affect it negatively.

If you wish you can remove any meta keywords which you have added to your project by deleting them from Step 2 Map Creation > Page Properties > General tab > Website keywords, then reuploading your project to the server.

As regards the warning from the W3C validator...  please study the screenshot I have attached.  You will notice there is a gap, a space, between this sentence, "Adobe photoshop CC aduce pe piata instrumente formidabile, inclusiv referitoare la editarea video." and this heading "Curs Adobe Photoshop CC - Cap. XIV. Bonus: Application and Resources".

Go to the Text Object in question within WebSite X5, and delete this space completely, then remake it again.  Upload to the server as before.

The existing space has hidden control formatting characters which need to be removed.  WebSite X5 did not add these characters: most likely they were included in a document which you copied and pasted.  When copying documents it is always best to remove Rich Text Formatting first by copying into Notepad, then pasting from there into the Text Object within WebSite X5.

Kind regards,

Paul