It's not enough that many other websites link to your site. The quality of the links is also important. 20 good links are better than 100 low-quality links.
If you want to get high rankings for the search term "buy brown shoes," it helps a lot if the links to your website contain these words. The text that is used to link to your site (the "anchor text") influences the words for which your website will get high rankings.
The anchor texts in the links to your website should vary, but they should contain the keywords for which you want to get high rankings.
Links from related web pages usually work better than links from unrelated pages. Links from unrelated pages won't hurt your rankings, but Google likes links from websites that are related to yours better.
A related page is a web page that has loosely to do with the topic of your website. If you have reason to believe that the visitors of the web page might be interested in what you have to offer, then the other page is a related web page.
It's okay to get links to your home page. It's better to get links to the page that is most relevant to the linked anchor text. If the anchor text is "buy brown shoes," then you should make sure that the link goes to a page that deals with brown shoes.
If the link text matches the content of the linked pages then it's more likely that your web page is really relevant to that term and it's more likely that you'll get high rankings for that search term.
Linking to the right page also increases the user experience. If a visitor clicks on a "buy brown shoes" link, it's much more likely that he'll buy on your site if he gets the correct page.
Links from pages with high authority will help to increase the Google rankings of your website. The Link Influence Score (LIS) in SEOprofiler's link building tools helps you to judge the authority score of a website.
The nofollow tag tells search engines that they should not follow a link. Links with that attribute don't help your search engine rankings.
The Link Manager in SEOprofiler checks the pages that link to your website, and it informs you when one of the pages uses the nofollow tag to link to your site.