An iFrame (inline frame) is an HTML element that makes it possible to embed another HTML file or a website within a page. When an iFrame is inserted into a web page, the content of the embedded page appears as part of the original page without the user having to leave the page.

However, the iFrame is considered outdated and should no longer be used as it has a number of disadvantages that can affect the user experience. Some of the disadvantages of iFrames include:

1. SEO problems: Search engines have difficulties indexing the content of iFrames, which can lead to problems with search engine optimisation.
2. Accessibility: iFrames can impair the accessibility of websites, as they are not always recognised correctly by screen readers.
3. Security risks: If a website embeds content via iFrames, this can cause security risks such as cross-site scripting (XSS) and clickjacking.

Neuroweb design should therefore avoid the use of iFrames and instead use modern technologies such as Ajax or JavaScript frameworks to integrate dynamic content into websites. An optimal user experience is essential for the success of a website and the use of outdated technologies such as iFrames can make the website less user-friendly and less effective.