{"id":22572,"date":"2011-07-12T10:04:17","date_gmt":"2011-07-12T15:04:17","guid":{"rendered":"https:\/\/www.pcmatic.com\/blog\/?p=22572"},"modified":"2011-07-12T10:04:17","modified_gmt":"2011-07-12T15:04:17","slug":"ask-leo-are-you-being-stalked-by-ad-networks","status":"publish","type":"post","link":"https:\/\/www.pcmatic.com\/blog\/ask-leo-are-you-being-stalked-by-ad-networks\/","title":{"rendered":"Ask Leo: Are You Being Stalked by Ad Networks?"},"content":{"rendered":"<p><img decoding=\"async\" src=\"https:\/\/www.pcmatic.com\/blog\/wp-content\/uploads\/20090929leonotenboomwp.jpg\" alt=\"askleo\" width=\"150\" height=\"150\" class=\"attachment wp-att-7652 alignleft\" \/><\/p>\n<p>By Leo Notenboom<\/p>\n<p><i>I feel like I&#8217;m being stalked. I see the same ad all over the place. The thing is that my wife doesn&#8217;t; she sees normal ads on the same pages that I see this stalker ad. What&#8217;s going on?<\/i><\/p>\n<p>People get pretty wrapped up when it comes to advertising, particularly<br \/>\nanything that uses the word &#8220;tracking.&#8221; They feel &#8211; as you probably do &#8211;<br \/>\nthat someone is tracking them specifically.<\/p>\n<p>Well &#8230; yes and no.<\/p>\n<p>Advertisers and advertising networks use as much information as possible to<br \/>\nprovide advertisements that are relevant to you and your needs. Sometimes, that might look like they&#8217;re following you around a little.<\/p>\n<p>I see the most common example right here on Ask Leo! I&#8217;ll use that as a<br \/>\nplace to start.<\/p>\n<h3>Contextual Advertising<\/h3>\n<p>Many web sites, including Ask Leo!, use Google AdSense to provide ads on the<br \/>\nsite, for which the site owners get paid.<\/p>\n<p>Services, like AdSense, are called &#8220;contextual&#8221; advertising, because when<br \/>\nasked to display an ad on a page, they&#8217;ll look at what that page contains and<br \/>\nthen try to display ads that are relevant to the topic.<\/p>\n<p>In other words, I don&#8217;t choose what gets advertised &#8211; Google does.<\/p>\n<p>On one hand, it&#8217;s not always spot-on. On the other, Google&#8217;s advertising<br \/>\nservice takes <em>much<\/em> more than just page content into account. The<br \/>\nconcept is pretty simple: provide advertisements that are as relevant<br \/>\nto what you&#8217;re doing as possible.<\/p>\n<p>Of course, that means they&#8217;re interested in what you&#8217;re doing.<\/p>\n<h3>Tracking does not imply personally identifiable<\/h3>\n<p>We talk often about &#8220;tracking cookies&#8221;, which is one of many ways that<br \/>\nadvertising services determine &#8220;what you&#8217;re doing&#8221;.<\/p>\n<p>For example, if you run around and visit a few web hosting service web sites,<br \/>\nas I sometimes do, you may find that advertisements on completely unrelated<br \/>\nsites are suddenly all about web hosting.<\/p>\n<p>I can see that it might feel like they&#8217;re stalking you.<\/p>\n<p>What&#8217;s happened, however, is that the advertising service has collected<br \/>\ninformation about where you&#8217;ve been &#8211; typically, through ads that it placed on<br \/>\nthose sites as well &#8211; and uses that to infer, &#8220;This person is looking at a lot<br \/>\nof web hosting sites. He must be looking for web hosting. Let&#8217;s show him ads<br \/>\nfor web hosting.&#8221;<\/p>\n<p>I run into this <em>all the time<\/em>. I regularly visit my own hosting<br \/>\nservice&#8217;s site, and for quite a while afterwards, almost every site that I visit that<br \/>\nruns Google&#8217;s AdSense shows me ads for that host.<\/p>\n<p>Does that imply that they know what Leo Notenboom is doing, that I specifically<br \/>\nam being watched?<\/p>\n<p>Not at all. If it did, they&#8217;d know that I&#8217;m already a customer. All that it means is<br \/>\nthat a computer algorithm somewhere simply noticed, &#8220;This browser visited<br \/>\nthese sites, so let&#8217;s feed it these ads.&#8221;<\/p>\n<p>Advertisers and advertising networks don&#8217;t care about <em>you<\/em> as an<br \/>\nindividual; what they care about and watch are the actions of <em>millions<\/em><br \/>\nof people in order to understand trends. They care about what the most people<br \/>\nare looking for and acting on.<\/p>\n<p>As an individual, you just aren&#8217;t that interesting.<\/p>\n<p><a href=\"http:\/\/ask-leo.com\/what_is_contextual_advertising_and_how_does_it_affect_my_privacy.html\" target=\"_blank\">Article continued here<\/a><\/p>\n<p>This post is excerpted with Leo&#8217;s permission from his blog.<\/p>\n<p>FaceBook URL:   <a href=\"http:\/\/ask-leo.com\/fb\" target=\"_blank\">Leo&#8217;s Facebook<\/a><\/p>\n<p>Twitter URL:     <a href=\"http:\/\/twitter.com\/askleo\" target=\"_blank\">http:\/\/twitter.com\/askleo<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p><img decoding=\"async\" src=\"http:\/\/techtalk.pcpitstop.com\/wp-content\/uploads\/20090929leonotenboomwp.jpg\" alt=\"askleo\" class=\"attachment wp-att-7167 alignleft\" \/><\/p>\n<p>By Leo Notenboom<\/p>\n<p>Contextual advertising uses on-site clues and additional information to place ads that are likely to be useful to site visitors, or to you.<\/p>\n","protected":false},"author":19,"featured_media":66012,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center 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center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[49],"tags":[591,46,592,4875],"class_list":["post-22572","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-leo-notenboom","tag-ad-networks","tag-ask-leo","tag-contextual-advertising","tag-leo-notenboom"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Ask Leo: Are You Being Stalked by Ad Networks?<\/title>\n<meta name=\"description\" content=\"By Leo Notenboom Contextual advertising uses on-site clues and additional information to place ads that are likely to be useful to site visitors, or to you.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link 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