Image SEO: Image ALT Attribute, Image Caption, and Image Title

Image SEO plays a crucial role in strengthening your on page seo. 

In this guide, we’ll unravel the significance of Image ALT Attributes, Image Captions, and Image Titles. Discover how these elements can elevate your website’s ranking and captivate your audience.

What is Image Alt Attribute?

The Image Alt Attribute serves as a crucial HTML element, providing an alternative representation of an image. 

Often abbreviated as “Alt,” it stands for “alternative.” Essentially, this attribute displays text in lieu of an image if the image fails to load. 

Also, if the image loads successfully, users typically don’t encounter the Alt text, hence its invisible. This is commonly referred to as “alt text,” this attribute ensures accessibility and comprehension across diverse user experiences.

What is an Image Title?

An Image Title serves as a supplementary element to enhance user experience and provide additional context to images on a webpage. Unlike the Alt attribute, which primarily caters to accessibility and SEO, the Image Title is a visual aid that appears when a user hovers their mouse pointer over the image.

What is Image Caption?

Image Captions are textual descriptions or explanations that accompany images on a webpage. Unlike Alt attributes and Image Titles, which serve specific purposes within the HTML structure, 

Image Captions are displayed visibly below the images, providing context, additional information, or even storytelling elements.

Think of Image Captions as the text that accompanies photographs in magazines or newspapers. They offer readers insight into the content of the image, helping to convey its meaning, relevance, or narrative. 

For example, on social media platforms like Instagram, captions are often used to provide context, share experiences, or add humor to the images shared.

On websites, Image Captions serve similar purposes. They can provide details about the subject matter of the image, credit the photographer or source, offer explanations, or even encourage engagement with the content.

Read Also – Image CDN vs Image Caching vs Image Optimization

Why Use Alt Attribute?

Alt Attributes play a crucial role in web design and accessibility for several reasons:

Fallback for Image Loading Failure: 

Alt Attributes ensure that if an image fails to load due to slow internet connections, errors, or other issues, users are presented with descriptive text that conveys the content and purpose of the image.

Enhanced Accessibility: 

Alt Attributes are essential for users who rely on screen readers or have images disabled in their browsers. By providing descriptive text, individuals with visual impairments can understand the context and meaning of images, thus improving accessibility.

Support for SEO: 

While it’s true that search engines have become more sophisticated in understanding images, Alt Attributes still play a role in image SEO. They provide search engines with additional context about the content of the image, which can contribute to better indexing and ranking in search results.

Improving Content Quality: 

Alt Attributes strengthen on-page SEO efforts by enhancing the overall quality and relevance of the content. By including descriptive Alt text that accurately represents the image, websites can provide more valuable information to users and search engines alike.

Common Mistake While writing Alt Text

While crafting Alt text, avoiding common mistakes is crucial to ensuring its effectiveness and relevance. 

Here are two prevalent errors to steer clear of:

Keyword Stuffing: 

While incorporating relevant keywords into Alt text can enhance SEO, overloading it with keywords is counterproductive. Keyword stuffing not only diminishes the user experience but also violates accessibility principles. Alt text should accurately describe the image’s content, focusing on clarity and relevance rather than keyword density.

Too Short Alt Text: 

Alt text that’s too brief may fail to convey adequate information about the image, limiting its usefulness to users relying on screen readers or encountering image loading issues. 

Strive to provide sufficient detail and context in Alt text to ensure accessibility and comprehension.

Read Also – What is lazy loading?

How to write perfect Image Alt Text? With Example 

Writing perfect Image Alt Text involves several key considerations to ensure accessibility, SEO optimization, and user experience. Here are some guidelines and an example:

Use Alt Attributes for All Images: 

Always include Alt Attributes for all images on your website. 

Even for images like social media icons where the context may seem self-explanatory, using a null Alt text (empty quotation marks “”) is better than omitting the Alt attribute altogether.

Optimal Alt Text Length: 

Aim for Alt text lengths between 80 to 120 characters. 

While Google typically considers only the first 16 words of your Alt text for indexing purposes, providing additional context can enhance accessibility and user understanding.

Avoid Replicating Website Content: 

Refrain from duplicating website content as Alt text. 

Alt text should focus on describing the content or function of the image rather than repeating text already present on the webpage.

Example of a Perfect Alt Text

Wrong Alt Text:

Alt Text: “IMG_1234.jpg”
Explanation: This Alt text provides no useful information about the image content. It merely identifies the image file name, which is uninformative and unhelpful for users relying on screen readers or facing image loading issues.

Not So Good Alt Text:

Alt Text: “Silver Laptop”
Explanation: While this Alt text offers some description of the image, it lacks specificity and context. It does not provide sufficient detail about the image’s content or function, making it less informative for users and search engines.

Better Alt Text:

Alt Text: “Silver laptop with a sleek design and illuminated keyboard on a wooden desk”
Explanation: This Alt text offers a detailed description of the image content, including the color, design, and setting of the laptop. It provides valuable context for users who cannot view the image and improves SEO by offering relevant keywords related to the image content.


In conclusion, mastering the art of Image SEO through thoughtful optimization of Alt Attributes, Image Captions, and Image Titles is paramount for enhancing website visibility and user experience. By understanding the importance of Alt text as a fallback for image loading failures and its role in accessibility and SEO, we can create more inclusive and search engine-friendly web content.