If I build links pointed to subpages, is it helpful to increase the page rankor quality of our home page?
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If I build links pointed to subpages, is it helpful to increase the page rankor quality of our home page?
Yes, Internal linking is very helpful in improving the SERP rankings of sub pages. It also improves the overall reputation of your website.
I think original poster was referring to deep linking, not internal linking, but both are equally important and useful for the ranking.
Yes, pointing backlinks to the inner pages of your website will help increase your SERP.