Providing Google with your sitemap allows the search engine to better navigate, index, and crawl your site.
From your home screen, click on your domain name to access your Site Dashboard. In the left-hand panel, click Crawl > Sitemaps. In the right-hand corner of the screen, click Add/Test Sitemap. Squarespace automatically provides sitemaps for their users. If you're a Squarespace user, simply type in sitemap.xml to the box that appears (see example below).