I have tried to shortlist Website for posting Guest Posting or say Buying, but how do I identify if they are part of Blog Network or sites selling these kind of links...... Means how to spot-find Quality Websites to post or buy Guest Posting?
Check their ranking and info on alexa to get and idea of traffic volume and health of the links they got. Examine the page for the quantity of links to external targets. Check Google pagerank using any pagerank tool available or browser add-on. Write the website url on Google between quotations and see if indexed correctly. Search for any statcounter or any public traffic data they have on blog or ask for a report of the past week or so. Traffic volume really doesn't matter, but try to post on websites related to your niche and keywords. Best of luck!
I did little search to find out the best solution for your query and came through three blog posts of my favorite bloggers. 1. Neil Patel: How to Find the Best Places to Guest Blog (http://www.quicksprout.com/2014/05/05/how-to-find-the-best-places-to-guest-blog/) 2. Mackenzie Fogelson: Five Steps to Finding (the Right) Guest-Blogging Opportunities(http://moz.com/blog/five-steps-to-finding-the-right-guest-blogging-opportunities) 3. Brian Dean: The Definitive Guide to Guest Blogging (http://backlinko.com/the-definitive-guide-to-guest-blogging) Read tips and suggestions given in the above mentioned blog posts. You will get right solution of your query.
Try to find whether posts are published frequently or not. Check whether they are spammy or not. Do you trust the blog/website yourself? You could check the Moz trust metric if you have access to it. But, there is no definitive method to detect blog networks.
and to detect blog network, there are a few signs you can look for if you’re concerned. • Hosting. Investigate the host of the blogs in question and see if it’s the same. You can use tools like BuiltWith to see if the sites were all created on the same framework or host. • Domains. The key to a successful – and fast – PBN is buying expired domains. Check into the history of the domain and see when the site was released in its current form. Check if the sites were all redesigned in the same week. You can use the Wayback Machine for these kinds of lookups. • WHOIS. The WHOIS database is the contact information for the owner of the sites. Having hidden WHOIS data is a red flag. If all of the site owners are the same, it’s obvious the blogs are connected. • Content. This is a big one; how much content is there on the site? More importantly, how much content is there on the sites linking to that site? The sites in the PBN often have very few posts. The money site will typically have more. • Backlink Profile. Run the site through a public backlink scan, like Ahrefs. If the PBN owner bought the domain, it will very likely have a large number of broken links. The PBN owner doesn’t have the desire to fill all possible previous pages with content; it’s more work than it’s worth. • Images and Videos. Multimedia content is harder to create uniquely than textual content. If the site uses nothing but stock images, or shares images between multiple sites, it’s possible they’re part of a PBN. This is even more obvious with video.