The Alternative Investment Market (AIM) is a sub-market of the London Stock Exchange designed for smaller, growing companies. It provides these businesses with access to capital while offering investors opportunities to invest in a diverse range of companies at various stages of development. AIM has less stringent regulatory requirements compared to the main market, making it easier for companies to list. AIM allows investors to diversify their portfolios by including shares from innovative and emerging firms. This market is particularly attractive for those looking to invest in sectors like technology, healthcare, and renewable energy, which often feature on AIM.