New Video: Website Cookies Explained by Common Craft Today we’re announcing a new video: Website Cookies, Explained by Common Craft. This video was suggested and voted on by Common Craft members who will use it to educate others in classrooms and on the Web. It teaches: How and why cookies are saved to your computer when visiting a website The role cookies play in helping websites remember you The two basic types: session and persistent cookies How advertisers may use cookie data How website owners use cookie data for analyzing traffic Watch it now.