To remove the "Powered by Squarespace" text from your Squarespace website, log in to your account and select the desired website, then hover over the text block or navigation link and click Edit. In most cases, this will bring up a footer editor where you can delete the text block or replace it with new content. Alternatively, if the text is presented as a navigation link, you can find it in the sidebar and click on it to delete or modify it. By doing so, you can customize the bottom of your website with your preferred text or blocks.