When publishing documents and images on the Internet, you can accidentally publish the information that you wanted to hide. It is especially important to consider that some formats of documents may contain hidden information that will be visible to search engines.
Since search engines index publicly available material on the network, including images, content that has not been completely edited, can be found through the search in Google. Technologies, such as reading from the screen, can make such “hidden” information more affordable, and popular images recognition methods, such as optical symbol recognition (OCR), allow you to find this content.
Despite the fact that a change in the size of the font, the use of the color of the text that matches the background, or hiding the text with the image can make it invisible to the human eye, such methods do not prevent indexing by search engines, and hidden information can be found.
Similarly, some types of documents may contain information that is not visible at first glance. For example, they can include the history of changes in the document, allowing users to see the text that was edited or hidden. In some cases, the full version of the image is preserved, including the parts that were cut or hidden. In addition, the metadata of the document may contain information about people who edited or viewed the file.
All these data may remain in the document even after its export or conversion to another format. If you need to delete information from the file, it is important to completely delete it before the file becomes publicly available.
Here are a few best practices for the correct editing of information in documents that you do not want to index and become available through Google Search.
The Google search indexes the images found on the Internet, both those on the web pages, and those that are built into various formats of documents. Images built into documents are often edited using only the instruments of editing the document itself. This can lead to the fact that hidden data will not be deleted when indexing the image separately from the document. Therefore, it is better to edit images before they are built into the document, and not after that. In particular:
After you follow these recommendations, export or save updated images in fixed or “smoothed” formats such as PNG or WebP. This will prevent the inclusion of unwanted parts of the image in a public document.
Before creating a public document, delete all the data that should not be displayed in its final version. Go to a format that does not preserve the history of changes. Here are a few additional recommendations:
If you have questions, you can contact the Seo.computer SEO company at e-mail info@seo.computer or through WhatsApp by number +79202044461.
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