I have a question: 1. What's the meaning for related link ? 2. some web site has only 10 link can also go to first position..why ? 3. they have linked from directory .. is it useful not other link ? 4. Is the subdomain is not good ?

Too many questions in 1 single topic guy. :-)

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I have a question: 1. What's the meaning for related link ?

Quality links does that


2. some web site has only 10 link can also go to first position..why ?

Quality human edited directories are good


3. they have linked from directory .. is it useful not other link ?

subdomain are good for directory submission that do not accept deep links submission


4. Is the subdomain is not good ?

Best,

subdomains are seen as separate sites - though links between them - main domain and subdomain have less influence mainly as they are on the same IP