Informal tone

It is recommended to not use an informal tone in technical documentation, as it is meant to be a professional, authoritative source of information for technical professionals. Technical documentation should be written in a formal tone to ensure that it is clear, concise, and accurate.

Using an informal tone in technical documentation can make it difficult for readers to understand. It is important to use precise language, avoid slang, colloquialisms, or jargon, and present information objectively to ensure that technical documentation is effective and reliable.

There may be some exceptions to this, such as when writing documentation for a consumer audience or when using a more conversational style to explain complex concepts in a more approachable way. However, even in these cases, it is important to maintain a level of professionalism and avoid using language or tone that may be inappropriate or confusing for the intended audience.

Examples
Many 404-error pages would mess up the domain health.
I was wondering if I can buy your products.