Ad Networks - Web Development Udacity English (auto-generated) Japanese

Ad Networks - Web DevelopmentYouTube↗ IA↗(long shot)
Education 6.7K views 27 likes 3 dislikes 23 Feb 2015

Udacity 651K subscribers United States YouTube↗

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I thought I'd take a moment real quick

広告ネットワークの説明は

to explain how ad networks work this isn't strictly relative or relevant to

さっと終わるつもりでしたし講義に関係ありませんが

this class but it's kind of a neat

Cookieの使用例をご紹介します

example of how cookies are used so say you have your browser and it makes a

ブラウザがWebサイトにリクエストし

request to some website and you know

WebサイトはHTMLでレスポンスを返します

this website responds with some HTML you know one of the things in this in this

このHTMLには1ピクセルの隠し画像が

HTML could actually be a little one pixel hidden image that you don't even

含まれています　見えないくらい小さな画像で

see that makes a request to somebody

他のサイトにリクエストを送信します

else for example google.com and this in fact

実際にgoogle.comでも行われていることです

happens and because Google comm has an

google.comの分析のパッケージセットは

analytics package that a lot of websites use to track you know traffic and what

トラフィックやユーザの行動を

users are doing and that sort of thing and google.com may respond you know

追跡するために使用されています google.comはピクセル画像と一緒に

it'll respond with the actual pixel image you know this might be in you know

レスポンスを返します

image source equals you know Google

画像のソースは恐らくgoogle何々です

something and this may have a cookie on there that will you know assign you some

そこにはCookieがありIDが付与されるので

ID so that when you come back to the website again and we you across this

Webサイトに戻った時にこの画像がリクエストされ

pixel again Google can track that you are the same user coming back and you

Googleは同じユーザが戻ったと認識できます

know that you know that's how they know

新しいユーザか戻ってきたユーザかを

whether you're a new user or a returning user and and so this is you know this is

そのような方法で判断しています

an example of a third-party cookie you

これはサードパーティのCookieの例です

know we went to Udacity comm in our browser but we received a cookie for

ブラウザでudacity.comにアクセスしますが

google.com you know Udacity doesn't

google.comのCookieを受け取ります

receive those cookies but Google will

UDACITYはCookieを受け取りませんが

and that's how they run their analytics

Googleは自社の解析ツールを合法的に使用しています

and and there are legitimate uses for this you know analytics is a really good

解析はとてもいい例です

example we you know we use Google Analytics on you know we use it on

Google AnalyticsはRedditや

reddit and we use it currently on Hipmunk and Udacity uses Google

Hipmunkで使われていてUDACITYも使っているので

Analytics as well so we can see you know

トラフィックや利用者の情報を

what our traffic is what people are clicking on that sort of thing there's

見ることができます　不正使用もありますが

also more sinister uses which is actions Google is a big user of this now Google

Googleはこのサービスをよく使っているので

knows something about you you know they

ユーザがこのサイトを訪れたことを知っています

know that you've been to this Web site and you may go to another web site you

ユーザがpets.comという別のサイトに移動すると

know let's say it's it's pets comm and pets comm you know returns HTML you know

pets.comがHTMLを返します

as usual and it has the same pixel which

いつもどおりの動作です

goes to google.com

そこに含まれる同じ画像がgoogle.comに行きます

all of a sudden Google knows hey you've

それでGoogleはユーザがudacity.comとpets.comに

been to Udacity comm and pets comm because they're like a common third

訪れたことを知ります udacity.comとpets.comはここでは

party here and Google actually has you

共通のサードパーティです　Googleには

know between Google Analytics and Adsense and that sort of thing they

Google Analyticsや Adsenseのようなサービスがあり

actually have pixels and since on a huge percentage of webpages

ピクセル画像を持っていて Webページで大きな割合を占めています

you know they have this one of the

最大の広告ネットワークを持つGoogleは

largest ad networks and so now they know

この情報を知っていて

this information and they can they can give you ads that are more relevant to

ユーザに関係がある広告を出すことができます

you which is sometimes you know you can

これには賛否両論あります

argue that both ways you can say oh that ads more relevant to me you know so I'm

ユーザに関係が深い広告なので

more likely to click on it maybe that's

クリックしやすいのは

a good thing or it's creepy that this

利点ですがアクセス履歴をすべて

company knows all these different websites I've been to now generally we

知られてしまうのは問題です

can trust Google but you can't say the same for all all ad networks so anyway

Googleは信頼できますが他もそうとは言い切れませんとにかくこれがトラッキングの仕組みです

that's kind of how they work they've got these little tracking pixels and when

ブラウザでサードパーティのCookieを

you disable third-party cookies in your browser you help disconnect yourself a little bit from from that sort of

無効にすればそのようなトラッキングを少し絶つことができます

tracking and you know I don't mean to

Googleを非難してはいません

pick on Google specifically because you know they're actually you know not to

実際Googleはそれほど怪しくありません

Shady but there are a lot of shady variations of this out there so that's how it works

しかし怪しい企業はたくさんあります

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