To insert a matrix from a website into Excel so that each number occupies a separate cell, users have suggested several methods. Copying and pasting directly often results in all data being placed in a single cell. Instead, utilizing the "Text to Columns" feature in Excel allows users to split the data into separate columns based on chosen delimiters like spaces or commas. If pasting into Excel fails, alternatives include pasting into Google Sheets first, provided Google Drive is installed, or converting the data into a CSV format. Users have also noted that saving the matrix as a text file can facilitate the import process into Excel. For those with programming skills, writing a script to format the data may be beneficial for larger datasets. Overall, the key takeaway is to use Excel's built-in features to effectively manage pasted data.