Advantages of SSR

#1. A faster first render (First Contentful Paint)

• With SSR, the browser gets already-built HTML - content appears instantly, with no wait for JS to load and run.
• With CSR, the user first gets an "empty page" and waits for JavaScript to load and execute.

Bottom line: an SSR page feels "alive" almost immediately, which matters especially on slow networks and mobile devices.

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#2. Better SEO

• Search bots (Google and others) see ready-made HTML content with SSR.
• With CSR they have to wait for JS to run, and some bots don't do that at all.

Result: SSR pages are indexed better, get into search results faster, and carry correct metadata.

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#3. Fewer interface "jumps" (Layout Shift)

• Content loads all at once, with no "flash" or DOM rebuild after JS loads.
• The user sees a stable page right away, with no layout jumps.

Result: higher Core Web Vitals scores (especially CLS and LCP).

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#4. Works even with JS disabled

• SSR delivers a complete HTML page, so basic content is visible even if JS never loads.
• This matters for accessibility, older devices, and restricted corporate browsers.

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#5. Better for social media and link previews

• SSR returns meta tags (og:title, og:image, description, etc.) on the server side, so links to the site show up nicely in previews on Telegram, WhatsApp, Twitter, Facebook, and others.
• With CSR, those meta tags often don't finish loading before a bot's request completes.

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#6. Personalized content on the first screen

• Data can be rendered for a specific user (e.g. name, cart, recommendations) right on the server.
• With CSR, this is only possible after JS loads and client-side requests run.

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#7. Easier state management before the client loads

• With SSR, you can gather all the data and hand it to the client already built, via __INITIAL_STATE__.
• This saves one extra HTTP request and speeds up hydration.

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#Summary comparison: