Attention mechanisms can improve the performance and interpretability of neural networks in several ways. First, they can help the network deal with long or complex sequences, by reducing the information loss and the computational cost. For example, in natural language processing (NLP), attention can help the network capture long-range dependencies and avoid the vanishing gradient problem. Second, they can help the network learn from multiple sources of information, by combining them in a meaningful way. For example, in computer vision, attention can help the network fuse visual and textual features for image captioning or visual question answering. Third, they can help the network explain its decisions, by highlighting the relevant parts of the input or output. For example, in machine translation, attention can show which words in the source language correspond to which words in the target language.