Is too much backlinks to website effective
 

I want to know to increase ranking of particular keyword likeBuilders in Cochin we want increase backlink

Too much backlinks doesn't guarantee the effectiveness of the website.
Backlink is just one of the factors search engines considered when ranking a site (serp).

This is true but good quality back links sure help very much.

Yes backlinks are important but focus on generating quality links that has some relevance to the topic of your page.linking without reason may negatively affect pr.

You can generate backlinks as much as you want because there are no limitations, but it takes a risk resulting to manipulation of rankings.

yes but now a days only natural back-link will work all other fake links are blocked by seo