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What are the specific, key metrics you track on an ongoing basis for your sites' SEO health?

I'll start with a few of mine (not exhaustive by any means):

Traffic
-- # of visits from each search engine
-- # of pages receiving visits from each search engine
-- # of keywords sending traffic from each engine

Links
-- # of linking root domains (from GWMT and Linkscape/OSE)
-- # of sites sending referral traffic
-- Domain Authority, Domain mozRank, Domain mozTrust

Content
-- Number of unique pages of content (by section/type)
-- Top content by linking root domains, # of search visits and # of referring keywords

Rankings
-- Rank position for all high volume, head terms
-- Rank position for a sample set of chunky middle and long tail terms
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Brendan Schneider's profile photoEric Vadeboncoeur's profile photoIvan Printis's profile photoAmaia Arana's profile photo
42 comments
 
We use a pretty similar list, with these additions:

Traffic
-- Branded vs. non-branded SEO traffic

Links
-- Page Authority for key landing pages

Content
-- GWMT crawl issues
 
Lately I've been really into % of total pages drawing visits from organic search -- it paints a pretty clear picture if only 14% of your pages are driving views from search results (and the same could be said for 84%).
 
-- # of landing pages from each search engine (or percentage of all website's pages)

Relative metrics:
-- average # of unique queries per landing page
-- average # of visits per landing page
-- average # of visits per query

Success metrics:
-- bounce rate by landing page types
 
I'll add the following to the above list

---% New Visits
---Increase in no. of landing pages for targeted keywords
---Increase in the no. of pages getting indexed from the XML sitemap submitted.
---- Average Time On Site
----Bounce Rate
----Click Thru Rate (As it to a great extent depends on the Titles and Descriptions)
---Rankings yes, but what we focus is on the new rankings of head terms and long tail along with a detailed report on the stability of the previous rankings achieved, i.e the consistency with which they rank every month for a long period of time.

A detailed post on SEJ by us on this topic :

http://www.searchenginejournal.com/google-analytics-metrics-monitor-the-seo-progress/25493/

What a co-incidence my next post on the WebPro blog which I am working on is on "Some SEO Myths and Some Metrics To Monitor For SEO Progress"
 
A bit different, funnel like:
-- Rank position
-- Impressions
-- Clicks
-- Visits
-- Conversions
for head and middle terms

In any case any metric not related to conversion is useless in my opinion.
 
Yes I would like to add # of Impressions too but I think it gets considered if you monitor CTR...
 
Additional to the ones listed above I also keep an eye on both the number of +1's associated to the site and also page load time metrics.
 
Also growth in the Traffic from Long Tails
 
Leads; although not under the direct control of the SEO team, we do still measure leads against 'relevant visitors' from search, i.e. Visits from targeted keywords that end up as a lead.

So Rankings, Visits from those rankings, Leads as a result of those visits.
 
- any changes in the bounce rate
 
- Branded vs non-branded traffic
- %of mobile visitors
 
they are good, and even:
- Organic traffic landing on the home page versus deep-content pages
- Bounce rate of organic search traffic
- New visitors versus returning visitors from organic search
 
+indexed pages/pages getting traffic from search engines
 
The main one is Year on Year comparison of non-brand traffic.
 
1) Total traffic
2) A page total unique visits vs No. of keywords it's ranking
3) Total No of pages in website vs Total no. of pages ranking in SERPs
4) No. of Duplicate Content pages
5) Regular Visitors Vs returning Visitors
6) Keywords
 
I check
- overall traffic in several analytics tools
- search traffic in more than one analytics tools
- referral traffic in more than one analytics tools
- traffic from money keywords in more than one analytics tools
- rankings/CTR/impressions in Google Webmaster Tools
- goals/conversions in more than one analytics tools

Indeed I am surprised to be just the third person that mentioned conversions at all.
 
1. # of search engine driven conversions.
2. Conversion % rate of search engine visits.
3. Visits from each search engine, broken down by brand and non-brand.
4. # of keywords driving traffic.
5. # of pages drawing traffic.
6. # of sites referring traffic.
6. If I have to, ranking positions of "trophy" keywords, change from last month, change from start, and number of visits driven by that keyword.
 
definitely Branded vs non Branded, as some traffic can come from off line advertising, which would drive more searches on branded keywords
 
I can add this: Phrase-specific and sitewide average based phrase ranking potential calculation using 40 days of GWT data including CTR, positions and traffic volumes (impressions & clicks). This is then 'enriched' with keyword tool data for fresh phrases, conversion rates and goal values to produce tangible financial potentials of each phrase.
 
Some good examples, here are some more to keep the convo going

- keyword traffic for each keyword we are working to rank, not watching this could mean working on the wrong keywords.
- overall conversion rate for the site as a whole
- conversion rate for the main keywords we are targeting, again very important if you work on conversion not just rankings which I believe is an important part of seo these days.

The list could go on but I think I will stick to 3 like Rand to give others a chance to add more, plus I don't want to risk saying the same as some of the above :)
 
In general, all these but it depends on the "nature" of the websites.
For example, I'm just analyzing an online newspaper and in this case I think "Time on Page" is one of the most important information.
 
One thing we also track is conversion method web form vs phone.
 
#1 Most Important Metric for me = How many customers via organic & other channels
#2 How many conversions from organic & other channels
#3 Lead to customer ratio (all channels)
#4 Visit to lead ratio (all channels)
#5 How many keywords drove organic traffic (regardless of rank and month over month growth)
#6 Leads/conversions via Branded/Nonbranded keywords
#7 Branded vs Nonbranded keywords driving traffic
#8 Leads/conversions from unknown keywords
#9 Unknown keyword percentage growth/reduction month to month

DEAD LAST - rankings. . .
 
Forget that... Bad publicity is still publicity!
 
+Jackson Lo Love where your head is at on this Jackson. A true "Inbounder's" approach.
 
Thanks for this post +Rand Fishkin . I am planning in using this (and some points in the responses) for our company and for me personally.
 
Traffic
-- # of visits from each search engine
-- # of visits from referrals
-- # of visits Branded vs. Not Branded
-- # of pages receiving visits from each search engine
-- # of pages receiving visits from referrals
-- # of keywords sending traffic from each engine

Links
-- # of linking root domains (from OSE and MajesticSEO)
-- # of sites sending referral traffic
-- Domain Authority, Domain mozRank, Domain mozTrust

Content
-- Number of unique pages of content (by section/type)
-- Top content by linking root domains, # of search visits and # of referring keywords
-- Top content by social signals (tweets/likes/+1s and - in few cases - pins)

Rankings
-- Rank position for all high volume, head terms
-- Rank position for a sample set of chunky middle and long tail terms
 
Whole Aim for SEO is actual conversions. So I will say % increase in non branded traffic.
 
I also track time on site, browse rate and conversion metrics for each search engine, as well as for key organic terms (per engine). While not a direct SEO influence, it helps identify weak landing page experiences.
 
A big +1 for +Chad Pollitt & for having a focus on business metrics.

Rankings & traffic that doesn't earn your business or your clients business money is useless.
 
Links
-- Domain Authority, Domain mozRank, Domain mozTrust

Content
-- Number of unique pages of content (by section/type)

Rankings
-- Rank position for all high volume, head terms
-- Rank position for a sample set of chunky middle and long tail terms

Also "bounce rate"...
 
Traffic
-- # nonbranded visits from search
-- # conversions from nonbranded visits from search
-- # nonbranded visits from search by product landing page
-- # conversions from nonbranded visits from search by product landing page

Links
-- # of linking root domains (from Blekko)
-- # of links (from Blekko)
-- Domain authority PageRank and HostRank (Blekko)

Content
-- # pages in primary google index
-- # pages in primary google supplemental index

Rankings
-- Rank position for all high volume, head terms (week on week)
-- Rank position for a sample set of chunky middle and long tail terms (week on week)
 
-- Drops in Ranking, look to see if on-page issue or competitor activity pushing up...
 
Depending on what site you own, of course. Mine are:

Geographics (looking for 95% United States) and Unique Visitors
Time on Site
Pages per visit
Referral Traffic
Direct vs. Search Engine (keywords)
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