Link Juice is the amount of positive ranking factor that a link passes from one page to the next. It is the Link Matrix of a given page that determines the quality of Link Juice one web page passes to the other.
Factors
1 Donot concentrate Link matrix on the Home Page - Link building around the home page makes the home page rank highly in the search results, but loses the opportunity for all of the other pages to rank as well. Instead, make an effort to weave in-coming links throughout your web pages, not concentrating too much on any particular one. This is called ‘deep linking’, and is a positive ranking factor.
Note: If a website has a balanced link juice distribution, every page on the website will have a good chance of ranking well.

2 Pass Link Juice from high performing pages to low performing pages - Link Juice can be passed internally. A web page on your website that is performing particularly well (lots of visitors, a high browse time, well designed and lots of high-quality inbound links), is able to pass link juice to a web page that is performing poorly.
Note: There are exceptions. If it is a low priority page such as a ‘contacts’ page, it is best not to waste any good link juice on it. A contacts page is never going to rank, so don’t try to make it, and don’t waste any good link juice on it.

3 Identify low-value pages on your website - If a web page is going to provide you with no benefits in the Search Engines Results Pages, then it is better to tell the search spiders not to visit these pages or pass them any link juice. If they spend their visits crawling low-value pages, you have wasted an opportunity to have optimized pages crawled. Low-value pages include – Contact pg, About pg, Pricing Pg and Meet the team pg.

4 Use Robots Tags, Robots.txt and NoFollow Tags - Great way to prevent search spiders from crawling and indexing low-value pages. Hence Web application development plays a crucial role while designing a website.

5 Make sure that no page is more than 3 clicks from the Home Page -If your site is under 800 pages, no single web page should be more than 3 clicks away from the homepage. If it is over 800 pages, no page should be more than 4 clicks away from the homepage.

Link juice is referred as the search engine bot passes into the links, if it's a do follow link.

How can a website get more link juice? The link juice in SEO terms is often talked about in relation to link building efforts such as guest posting, blogger outreach, linkbait and broken link building. These are in a way linked to web application development services. Websites with little link juice will rank poorly. As links are built, and more link juice flows to the website, it will gradually start ranking better.

Link juice is a non-technical SEO term used to reference the SEO value of a hyperlink to a particular website or webpage.

Link juice is a colloquial term in the SEO world that refers to the power or equity passed to a site via links from external or internal sources. This power is interpreted as a vote of recommendation toward your site and is one of the most important factors in determining your site's search ranking (and PageRank).

Link Juice is a term in search engine optimization that describes how much value, relevance & authority a page passes to another page because it links to it. The amount of link juice is determined by, among other things, the number of incoming and outgoing links and their quality.

Link juice somewhat refers to power of the back link

"Link Juice" is a slang term referring to how powerful a certain link is or could be. The idea is that a link from a well known website that is trusted by the search engines will pass more "juice" than one on a pointless directory.

Link Juice is the amount of positive ranking factor that a link passes from one page to the next.

This power is interpreted as a vote of recommendation toward your site and is one of the most important factors in determining your site's search ranking (and PageRank).