Now, 95% of webmasters focus on the traffic brought into the website through regular searches, but ignore image searches. In this era of image reading, images have a very important impact on websites, especially websites with more images. Image optimization is a very detailed SEO optimization process. Maybe if you add an extra ALT, the image may be ranked first. If the image is well optimized, it will bring unexpected traffic to the website.
First give a perfect picture code:
...
<title>... keyWord ...</title>
...
<h2>... keyword ...</h2>
<p>
<img
src=".../xxx-keyword-xxx.jpg"
alt="... keyword ..."
title="... keyword ... - Copyright xyz"
width="600" height="450" />
<br />
Image: <strong>... keyword ...</strong>
</p>
<p>Here is text, including keywords... Here is text, including keywords...</p>
This is the most complete optimization method for image optimization. We see that many image websites will use this code to display a single image. It contains the following information: title, H2 tag, ALT, image title, image description, Text around the image. Here are the factors that affect the ranking of images:
1: onpage ranking factors
The surrounding text, that is to say, the text around the picture should contain one or more keywords. If it is an independent web page, then the role of TITLE is very obvious, but if the article is very long,
The ALT attribute is an important part of search engine optimization. It is best to include keywords in the ALT. If your image has a link, the ALT will be processed as an anchor text.
The TITLE attribute plays a minor role, but this text is very important to the user, as the text will automatically appear in the tooltip when the mouse is placed over the image. Content relevance. There are many examples of well-ranked images but irrelevant web content. This problem has not been completely solved until now.
2: Onpicture ranking factors
Image size: Images should be between 320 pixels and 1280 pixels for best search optimization. According to the experience of foreign netizens, the larger the image, the easier it is to rank on the first page of Google search results.
The ratio of the image should be 4:3 in the most perfect way, and the maximum is 16:10, which means that the horizontal image is more conducive to search engine inclusion. However, with the advent of the image reading era, search engines' inclusion of images will also change.
Picture file name: A successful picture has a very important file name. For example, a descriptive file name such as "parrot.jpg" is more conducive to optimization than "t123.jpg", but a long file name will be counterproductive.
Image type: JPEG, GIF or PNG? My opinion is that JPEG format images are more included in Lu Songsong’s blog, but PNG has a better compression rate. Of course, this is just a personal feeling.
Copyright statement: Many website content pictures will display "VIA or source", which indicates that pictures from a certain website are quoted. This not only shows that this is a responsible website, but also increases the ranking of pictures from the source website.
File size: The size of the image does not affect the ranking factor, but small images load faster. It is usually necessary to compress the image to 60%-80% without affecting the quality.
Originality: Obviously, both Baidu and Google like original pictures. Search engines are mainly determined by calculating hash values, pHash algorithm and SIFT algorithm, which will not be described here.
Link: If the image contains a link, it may bring unexpected traffic. Although hotlinking pictures takes up a lot of traffic, it does not occupy CPU resources. If the server resources are sufficient, you can remove the hotlinking settings for pictures.
Practical experience in image optimization
1: ALT is very important. Use concise and descriptive text for image file names and alternative text, including keywords but not too long.
2: Add a link to the image, but don’t write the description text too long.
3: Create a special storage directory for pictures, such as the upload or images directory.
It should be noted that image optimization will not have an immediate effect. It often takes 2-7 days or even longer to be included. Depending on the keyword competition, the image will slowly move to the first place in the search results.
Author: Lu Songsong
URL of this article: http://lusongsong.com/reed/497.html
(Editor: Chen Long) Personal space of the author Lu Songsong’s blog