Naiba recently reviewed several friends' foreign trade websites and found that, besides issues with titles and descriptions, the most common problem is
missing image ALT tags. Therefore, this article introduces
the role of image ALT tags in Google SEO and how they should be written.。
What is an ALT tag?
First, a visual demonstration: the alternative text for the image in the picture below is the alt tag.
The format in HTML code, if you are using WordPress, is as follows:
<img class="class值" src="图片地址" alt="alt标签内容" width="宽度" height="高度" />You can now go into your own self-built website's backend and check if the images you uploaded all lack this value?
The alt tag serves as a text hint for an image, typically used to describe the content of the image. Alt tags can play a certain role in SEO and also serve as a rescue for articles when images fail to load.
How does the alt tag rescue an article when images fail? It's like the situation shown in the picture below.
When the images in your article are missing, the webpage can display the alt attribute value of the image, allowing users to mentally picture the image content while reading the article, which is more friendly than a purely broken image.
The role of ALT tags in SEO
Most friends running foreign trade websites are selling products, so there are many product images on the website. Therefore, the role of alt tags in the SEO process is quite important.
1. Alt tags directly affect image SEO performanceFriends who use search engines know that besides searching for web pages, image search is a widely used feature. Filling in alt tags helps search engines quickly identify the content of your images (with technology today, even without alt information, machines can probably recognize the general content of an image, but certainly not as accurately as with alt tags). Search engines identify your image content through alt tags and, through contextual analysis, rank your images. When users use image search, they may find images from your website, thus gaining traffic through image SEO. For example, the image below shows the effect of an image from Naibabiji's website found via Google image search.
2. Alt tags can enhance user experience and search engine friendlinessUser experience, as demonstrated earlier, means that even if an image fails, users can understand the image content through the alt tag and mentally fill in the content, preventing a direct break in thought. Search engine friendliness, simply put, means that whether it's Google, Baidu, or Bing, they all recommend filling in alt information. If you don't fill it in, aren't you ignoring their advice and making it harder for them to crawl and index?
Note: Alt tags do not increase keyword density, so avoid keyword stuffing.How to correctly write alt tags?
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Google SEORemember a basic principle: prioritize user experience. So, how should we write the alt information for images? That is,
be factual; write the tag based on what the image content actually is. 
Google's official recommendations are as follows:
Use short but descriptive filenames and alternative textLike many other parts of a webpage considered for optimization, short but descriptive filenames and alternative text are ideal.
Practices to avoid:- Avoid using generic filenames like „image1.jpg“, „pic.gif“, „1.jpg“ whenever possible (if your site has thousands of images, you might want to automate the naming process).
- Avoid excessively long filenames.
- Avoid stuffing alternative text with keywords or copying and pasting entire sentences as alternative text.
Provide alternative text when using images as linksIf you decide to use an image as a link, providing alternative text helps Google better understand the page you are linking to. This is similar to writing anchor text for text links.
Practices to avoid:- Avoid writing overly long alternative text that could be considered spam.
- The website navigation uses only image links.
References:- https://support.google.com/webmasters/answer/114016
The format in HTML code, if you are using WordPress, is as follows:
When the images in your article are missing, the webpage can display the alt attribute value of the image, allowing users to mentally picture the image content while reading the article, which is more friendly than a purely broken image.
1. Alt tags directly affect image SEO performanceFriends who use search engines know that besides searching for web pages, image search is a widely used feature. Filling in alt tags helps search engines quickly identify the content of your images (with technology today, even without alt information, machines can probably recognize the general content of an image, but certainly not as accurately as with alt tags). Search engines identify your image content through alt tags and, through contextual analysis, rank your images. When users use image search, they may find images from your website, thus gaining traffic through image SEO. For example, the image below shows the effect of an image from Naibabiji's website found via Google image search.
2. Alt tags can enhance user experience and search engine friendlinessUser experience, as demonstrated earlier, means that even if an image fails, users can understand the image content through the alt tag and mentally fill in the content, preventing a direct break in thought. Search engine friendliness, simply put, means that whether it's Google, Baidu, or Bing, they all recommend filling in alt information. If you don't fill it in, aren't you ignoring their advice and making it harder for them to crawl and index?Note: Alt tags do not increase keyword density, so avoid keyword stuffing.
Google's official recommendations are as follows:Use short but descriptive filenames and alternative textLike many other parts of a webpage considered for optimization, short but descriptive filenames and alternative text are ideal.Practices to avoid:
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