I've used a couple of SEO software programs over the last 4 years. Moz, Serpstat, SEM Rush and now Ahrefs. Since the bulk of my focus is actually building links, I think Ahrefs has the most reliable results. For example, if you checked the backlink profile of 10-20 websites on Ahrefs and compared to another SEO software provider, I bet that you would average at least 10-15% more results with Ahrefs. That can be a lot more opportunities! Their keyword phrase tracker seems to work pretty quickly and seems to be accurate.
One thing I like about Ahrefs is that it's straight and to the point. It's very easy to get in, get your data, and get out. Each report does pretty much what you expect it to. This report shows the referring domains + number links coming from that domain. You can access the links from each domain by clicking the Expand button next to the referring domain:

Basically, Google shows the autocomplete suggestions whenever you start typing anything into Google search box. It is in Google's best interest to show the most relevant keywords in the autocomplete suggestions. Keywords that would help Google to retrieve the most relevant websites and help users find the most relevant content for their search query.
The biggest downside I think is the inaccurate keyword volume sometimes. Previously, I was only using Google's keyword planner and it gave us more precise volumes. I guess it's easier for Google since it's their own tool and they can give better numbers. This confuses us because in Ahrefs we may see potential in various keywords but in the long run, after our articles are published – the traffic is not what we expect sometimes. Though, it's accurate enough for the most part.
Are you a business owner, online marketer or content creator? If so, most likely you would like more people to visit your website, read your content and buy your products or services. The easiest way to achieve it is to find out what your potential customers or readers are searching for on Google and create content on your website around these topics.
Google Webmaster SEO Starter Guide - Originally written for Google Employees to improve website performance with users and search engines. Related Terms: SERP - Search Engine Rank Position  |  PageRank (PR) - Named for Google Co-founder, Larry Page. The PR Scale of 0-10 rates a web page. In the past, rank was based on the number of high ranking links pointing to the website. Recently factors like relevance and quality have gained importance. This website's current PR rating: 
Google cares about Content first and Links second when it comes to how it ranks a page within it's results. This tool allows us to see where competing domains are earning links and insights into the specific content that attracts links for the competition. This insights assist us in creating an actionable strategy for our clients using a CRM such as Buzzstream to import data into.
One of the things that AHrefs is best at is helping with a content marketing strategy. Though it's best known as a backlink index (which it's great at and I'll get into that), coming up with good content ideas is one of the things I get the most use out of it with using the content explorer. I find articles that do well for the topics I want to target and it's clear what already resonates with your audience which is powerful.

Another function included in the backlink profile section is the data for Referring Domains. Basically speaking, it shows you the number of websites that are linking to the domain you’ve inputted in the search bar. So, in this instance, I’m using seo-hacker.com as the target website/URL, and the number of referring domains is shown with the corresponding details you will ever need:
If you would like to know how to use hashtags to get popular on YouTube, you can use a useful YouTube hashtags generator like Keyword Tool. All you need to do is key in the topic related to your video in the search bar. From the results, you can select relevant, high-volume hashtags to insert in your video titles and descriptions to help people find your content.
Another advantage of using Ahrefs is their “Fresh Index” “Live Index” switch that displays backlinks that Ahrefs’ crawler found. The main difference between the two is that the Live Index is updated every 15-30 minutes to show live links in your site. For Fresh Index, it is updated at a much longer timeframe, but it still displays dead links which give you the chance to reclaim or change the dead link.
Another function included in the backlink profile section is the data for Referring Domains. Basically speaking, it shows you the number of websites that are linking to the domain you’ve inputted in the search bar. So, in this instance, I’m using seo-hacker.com as the target website/URL, and the number of referring domains is shown with the corresponding details you will ever need:
The thing that I liked the best about Ahrefs is that it contains a huge database of backlinks when I've checked my own website and my competitor's websites. This has allowed me to dig deeper and find out their exact linkbuilding and SEO strategies. Ahref contains a lot of tools and features that will make the life of an SEO professional or webmaster who wants more search engine traffic a lot easier. One of these features is the batch analysis feature. Basically, instead of entering your competitor's backlinks one at a time you could actually enter it once. This allows you to quickly check on the SEO metrics for a lot of competitor URLs in just one click.
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