Google’da ilgili aramalarda ilk çıkan bir web sitem var ve wordpress ile yapılmış. Performans iyi ancak teknik SEO kötü. Organik SEO, alan adı dış referansları ve trafiği iyidir.
Web sitesini nextjs’de yeni UI/UX, daha iyi performans ve SEO ile aynı alanda yeniden inşa edersem, bu durum sıralamamı ve Google puanımı etkiler mi?

Same case. Would love to know. Lately been dipping my toes into SEO
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If it shows up first then why rebuild it at all?
This is a tough question. It’s about the same as “will using this hammer on my house make it better or worse?” – the answer of course is it depends if you’re building a new room or smashing windows.
The same is true for website changes. Ideally, you could make it better. Fix any technical shortcomings while adding new features/content.
WordPress out of the box is pretty technically sound though. NextJS out of the box is not.. it requires customization to be good for SEO.
If you do it right though, it can be better. The chances of making it worse if you don’t know what you’re doing though, are high.
There might be a temporary fluctuation in the performance, but everything done in well planned way ,,, the fluctuation may be just minimal. Consider the following suggestions while changing the platform:
1. Make Sure the meta title, meta descriptions, and heading( H1/H2) or title should not be changed.
2. The content/copy should not be changed/removed.
3. The internal linking should not be changed/removed.
4. If the URL structure will be changing, then make sure to add 301 redirections, infact create a proper redirect strategy to redirect old URLs to new Ones before moving the platform.
5. Export all the top-performing pages GSC and make sure nothing changed on those pages. They are your top-performing pages, and you can’t lose breaking those pages.
I hope this helps you.