How Reviews Flow Around the Web

how reviews connect Click on the image for a big version, suitable for framing. My colleague Kris wrote a fine post a couple of weeks ago on the importance of online reviews for local business, and how to get them. Following that post, we did a little research to figure out how reviews get passed around between major local search sites in the US. This graphic illustrates some of our findings. If an arrow is pointing from one site to another, it means reviews from the source site are showing up on the destination site. An arrow with a dotted line means we found very inconsistent results, i.e. reviews from the source site might show up on the destination site, but often don’t. We sampled a variety of business categories around the country in our research, but may well have missed some relationships. The number in parenthesis next to the site name is our estimate of monthly visits to the site. Some of these are taken straight from, but some required a little more figuring. More on estimation below.

A Few Interesting Relationships

While researching, we noticed a few interesting relationships:
  • AOL recently started showing Mapquest results for local category and business name searches in their search engine.
  • While Google gathers review content from many sites, Citysearch, Yelp, Insider Pages and Judy’s Book tend to be more visible than other sites mentioned here.
  • Insider Pages and Citysearch (both owned by IAC) almost behave like two front ends to the same source data. Most content is shared back and forth between the two, and almost all sites that show Citysearch reviews also show Insider Pages reviews.

How We Estimated Visits

We thought it would be useful to include traffic estimates in our diagram, but take them with a good sized grain of salt. Measurement of web traffic is an inexact science in any circumstance, and becomes even more difficult when you are trying to understand the local intent of searchers on a general search site like For Yahoo, Bing and Google, we estimated that 10% of general search traffic has local, commercial intent. We also added 10% of AOL search traffic to Mapquest, since Mapquest results are shown for local results on AOL. You can see the logic behind using 10% in our “What Percentage of Search is Local?” post, but it’s just a ballpark. In any case, we believe industry estimates often underrepresent how much local search is happening on the big search engines. There is also some difference between the nature of local search happening on the sites we included. For example, people going to Mapquest are less likely to be looking for a new dry cleaner, and more likely to be finding directions on a map. Conversely, people going to Yelp are a prime target for influencing – the site is all about helping people make commercial decisions. So again, take volume numbers with a grain of salt.

If We Were To Pick Three…

…that are more important than the rest, we’d say Citysearch, Yelp and Yahoo Local. Citysearch is  a slam dunk – their reviews show up on almost every site, and get prominent placement on many. Yelp is our second choice because the Yelp community is very active and reviews are all that matters on Yelp. Yelp reviews also get good placement on Google Place Pages and get syndicated to a number of smaller sites that are not on this chart. Yahoo Local is important because 3rd party reviews are ghettoized on Yahoo. You have to click the “web reviews” tab to see them, and the star rating displayed in Yahoo search results is based on Yahoo reviews. Google is also putting more emphasis on reviews in their results. For the time being Citysearch and Yelp will have you covered in Google, but once Google gets enough review content, they may start to favor their own reviews.

Niche Sites

We looked at major local search sites serving the US market, and a few smaller properties that are influential in the review space. When encouraging reviews for your business, you should also look for sites that are specific to your vertical or location, as these can be important to your target customer. For example, Urbanspoon and Opentable are important restaurant review sites, and Tripadvisor is very important for travel. To find sites in your niche, search for your business category in Google Maps, and see where your competitors are getting reviews. Do you have experience with web reviews? We’d love to hear your thoughts!
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Derek A
Derek A
13 years ago

Hey! Thanks for the GREAT post! Really interesting infographic here; this is definitely the most helpful post I’ve seen on this topic.

Two comments.
1) Mapquest is -not- using Citysearch data, at least for telephone numbers; they have their own business listings now that pulled some out of date data. At least for the sites I deal with. See e.g.

2) The notation for Judy’s Book is confusing; at first glance I thought 273K read 273M. I thought it was a typo, since I missed the units. I had never heard of that site, and I was hugely surprised that they have as much share as Mapquest, Yahoo Local, Bing Local, and Citysearch combined. (They don’t, obviously, at 0.273M.)

Thanks again! We were already using Citysearch as our go-to review site, but it was mostly based on a gut instinct there 🙂 🙂 🙂

Derek A
Derek A
12 years ago

Hi Nico,
Thanks for getting back to me BTW. A new twist in this is that I haven’t seen Citysearch reviews or other “around the web” reviews in the same place as previously… at least in the handful of businesses I follow. Now, it looks like :

3 reviews – Place page – Write a review (4)

Where the 3 reviews are the 3 Google reviews, and the 4 Citysearch reviews don’t seem to count as much. At least, previously, it was listed as 7 reviews along with Google pulling the number of stars in the Citysearch review. (I’m thinking Google+ might have something to do with this change.)

What are your thoughts here?

11 years ago

[…] distribution opportunity wide-open. Currently at 9 million visits per month. Citysearch is also a powerhouse when it comes to review syndication. To add your listing: add business  – note that you must be logged in to a personal Citysearch […]

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