Best Ways to Earn Natural Backlinks for a New Website?

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Hi everyone,
I’m fairly new to SEO and currently working on my first website, which is still in its early stages. I understand how important backlinks are, but I’m trying to avoid spammy tactics and focus on long-term, natural link building.

For a brand-new site with low authority, what link-building strategies have you found to work best today? Is guest posting still effective, or are there better alternatives like digital PR or niche edits?

I’d really appreciate any advice, real-world experiences, or mistakes to avoid. Thanks in advance!