Let's take a look at what the top 100 social websites are, ordered by domain authority. I think you will be as surprised as I was in some of these predictions.

But first…

What is Domain Authority?

Domain Authority (DA) is a search engine ranking score developed by Moz that predicts how well a website will rank on search engine result pages (SERPs). The higher the DA score, the higher Moz expects the domain to rank.

You can read more about domain authority at Moz's learning center page on the subject.

Top 100 Social Websites by DA

Social WebsitesDomain Authority (DA)
tumblr.com100
pinterest.com100
github.com99
wordpress.com99
flickr.com99
instagram.com99
myspace.com99
themeforest.net98
stumbleupon.com98
sourceforge.net97
en.gravatar.com97
disqus.com97
slideshare.net96
goodreads.com96
ted.com96
xing.com96
tripadvisor.com95
ustream.tv95
cnet.com95
ebay.com95
soundcloud.com95
yelp.com95
slashdot.org95
livejournal.com94
etsy.com94
openstreetmap.org94
foursquare.com94
behance.net94
issuu.com94
medium.com94
kickstarter.com94
moz.com94
buzzfeed.com94
last.fm93
houzz.com93
scribd.com93
livestream.com93
zillow.com93
change.org93
store.steampowered.com92
twitch.tv92
storify.com92
lonelyplanet.com92
theverge.com92
wikihow.com92
reverbnation.com92
usgbc.org92
meetup.com92
photobucket.com91
my.fool.com91
orcid.org91
gamespot.com91
bitbucket.org91
about.me91
calameo.com91
mendeley.com90
mixcloud.com90
scoop.it90
quora.com90
500px.com90
independent.academia.edu89
bloglovin.com89
steamcommunity.com89
giphy.com89
instructables.com89
blurb.com88
zotero.org88
kiva.org88
dailykos.com88
callforservice.ning.com88
popsugar.com88
blogtalkradio.com88
newmediavault.ning.com88
sbnation.com88
hubpages.com88
diigo.com88
dreamstime.com87
canva.com87
udemy.com87
polyvore.com87
imageshack.com87
strava.com87
discogs.com87
infogram.com87
plurk.com87
wiki.answers.com87
getsatisfaction.com86
visual.ly86
instapaper.com86
metacritic.com86
angel.co86
allmusic.com86
couchsurfing.com85
society6.com85
4shared.com85
funnyordie.com85
ghost.org85
paper.li85
audioboom.com84
redbubble.com84

Although I don't have a specific SEO section yet, you can think SEO as an extension of Step 7: Marketing.

What surprised you as having high domain authority in this list? For me personally it was the old websites that I forgot about, like Myspace! Who remembers, let alone still uses Myspace? 😛

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