Thank you very much for the master class ...

I can't quite understand the "Lighthouse Performance is Low at 67%."
(bad translation?)

I do not understand either:

"Retina mode" I've looked for help but I can't find anything? ... I can't imagine what it's about ...

WebP? What is? What is it for? (I have also searched, and nothing)

I have xara designer Pro x V.17 ....

I did the grouping of text for the purpose of presenting the Home, because the texts look very well defined ... if I leave it as text (essential for SEO) they look very bad, very pixelated ... why does this happen?

again, thank you so much for the class ...