27sem.com Site Title

信息流广告_SEM教程学习平台-艾奇在线

27sem.com Meta Description

艾奇在线是业内权威的信息流广告和SEM视频教程学习与培训平台，内容涉及百度SEM账户优化，信息流优化，竞价数据分析，优化师面试招聘求职等；课程包括信息流广告投放培训，竞价排名培训，APP推广，SEO优化，电商运营等互联网广告系统教程，助力广告优化师的职业成长。

27sem.com Test Results

27sem.com Mobile Usability: 75/100

Quick overview:
Size content to viewport
The page content is too wide for the viewport, forcing the user to scroll horizontally. Size the page content to the viewport to provide a better user experience.
The page content is 762 CSS pixels wide, but the viewport is only 400 CSS pixels wide. The following elements fall outside the viewport:
The element <img src="http://www.27s…es/default.png" class="top-icon"> falls outside the viewport.
...
Size tap targets appropriately
Some of the links/buttons on your webpage may be too small for a user to easily tap on a touchscreen. Consider making these tap targets larger to provide a better user experience.
The following tap targets are close to other nearby tap targets and may need additional spacing around them.
The tap target <div id="search_lock" class="transition_04 search_lock">文章 学堂  热…-87SEM 今日头条 方案</div> and 25 others are close to other tap targets .
...

27sem.com Mobile Speed: 54/100

Quick overview:
Optimize images
Properly formatting and compressing images can save many bytes of data.
Optimize the following images to reduce their size by 245.2KiB (61% reduction).
Compressing http://27sem.com/upload/course/5852121e9f203.jpg could save 154.7KiB (79% reduction).
...
Eliminate render-blocking JavaScript and CSS in above-the-fold content
Your page has 2 blocking script resources and 5 blocking CSS resources. This causes a delay in rendering your page.
None of the above-the-fold content on your page could be rendered without waiting for the following resources to load. Try to defer or asynchronously load blocking resources, or inline the critical portions of those resources directly in the HTML.
Remove render-blocking JavaScript:
http://27sem.com/Public/index/js/jquery-1.10.2.min.js
...
Optimize CSS Delivery of the following:
http://27sem.com/Public/index/css/home_css.css
...
Leverage browser caching
Setting an expiry date or a maximum age in the HTTP headers for static resources instructs the browser to load previously downloaded resources from local disk rather than over the network.
Leverage browser caching for the following cacheable resources:
http://player.polyv.net/script/polyvplayer.min.js (expiration not specified)
...
Reduce server response time
In our test, your server responded in 0.98 seconds. There are many factors that can slow down your server response time. Please read our recommendations to learn how you can monitor and measure where your server is spending the most time.
Enable compression
Compressing resources with gzip or deflate can reduce the number of bytes sent over the network.
Enable compression for the following resources to reduce their transfer size by 59.2KiB (65% reduction).
Compressing http://js.ptengine.cn/3591ecb9.js could save 27.3KiB (65% reduction).
...

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