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I have increased DA of my site by applying these things.
Making quality links.
Getting sponsored posts from relevant sites https://www.yojanaforyou.in/

I have 2 scenarios
No 1. DA Dropped.
No.2. DA Increased.
My website https://apkwa.net/ is dropped from DA 18 to DA 16.
As compere to domain https://www.budgetingenterprise.com/ Which has gained DA 1 to DA 4.
What's that matter?