Alexa's ranking of top 30 USA websites in terms of traffic as of December 2014:

1 - 10
Google - #1 search engine of world info, webpages, images, videos [1]
Facebook - Social utility, connects people, share photos & links [2]
Amazon - A most customer-centric company [11]
Youtube - Upload & view videos [3]
Yahoo - Portal, service provider, search engine, news, email [4]
Wikipedia - A free encyclopedia built collaboratively [6]
ebay - Major auction site, with products sorted into categories [14]
Twitter - Social network & microblog, instant messaging, SMS [9]
Reddit - User-generated news links. Vote stories to front page [na]
Linkedin - Find & recommended job candidates, industry experts [16]
11 - 20
Go - Disney.com [23]
Imgur - Share photos with social networks & on-line communities [na]
Craigslist - Regional, free & paid classified ads & postings [18]
tumblr. - Blog & hosting, templates, bookmarks, photos, apps [na]
Pinterest - Online pinboard: post collections of things [na]
ESPN - Sports news. Game schedules, scores & results, articles [na]
Netflix - Flat monthly fee streaming TV and movies service [na]
Walmart - Major on-line retail shopping of wide range of items [na]
Live - Microsoft Search engine [5]
Bing - Microsoft SE. Web, image, video, local, news, products [na]
21 - 30
Paypal - Online payment service. Send money, pay bills [na]
Blogspot - All things Google [na]
BEST BUY - Retail consumer electronics & entertainment software [na]
CNN - News, weather, sports, e-mail news alerts, audio/video [na]
Apple - Retail site, with details of products and services [25]
Target - Retailer. W/careers, news releases, investor info [na]
IMDb - Movie/TV info, plot sums, reviews, cast lists, schedules [19]
Huffingtonpost - Columnists, blogs, news, moderated comments [na]
Chase - The largest banking company in the United States [na]
Nytimes - Online edition of newspaper's news & commentary [na]

Numbers in brackets [] indicate Alexa ranking as of December 2011.
[na] indicates webiste was not in Alexa top 25 in December 2011.


25 TOP RANKED WEBSITES from December 2011:

GOOGLE - Premier Web Search & More
FACEBOOK - Social utility connecting people
YOUTUBE - Broadcast yourself, view hundreds of video clips
YAHOO! - Personalized content & search options, free e-mail & more
WINDOWS LIVE - bing * MS Search engine better than most
WIKIPEDIA - An online collaborative encyclopedia
BLOGGER.COM - Blog, weblog publishing tool
MSN - Dialup access and content provider.
TWITTER - Social networking & microblogging
MYSPACE - Social Networking Site

AMAZON - Buy anything online (books, music, DVDs)
WORDPRESS - Blog site manager software
MICROSOFT - Product info (Windows, Office etc.) & support
EBAY - Premier auction site (buy & sell)
RAPIDSHARE - Free file uploading & sharing
LINKEDIN - Finds links for jobs, industry & business
FLICKR.COM - Share photos & watch the world
CRAIGSLIST - Community bulletin board, job lists
IMDB.COM - Movie DB, plot summaries, reviews, casts & schedules
AOL.COM - Online portal, search, shopping, channels

BBC.CO.UK - Newsline & Headline tickers, News, Weather, Sports
CONDUIT - Create custom web sites
GO.COM - A searchable directory, news, stocks, sports & free e-mail
DOUBLECLICK.COM - Coordinates targeted Internet advertising campaigns
APPLE - Computers & Electronics (iPhone, iPod, iPad, App Store)