what is the use of bookmark ?

Question

refer this website http://www.spiderseeker.com/

he has given a drop down menu called bookmark with so many social media sites

for what purpose the website owner has given them

Answer 1

Same as any other type bookmark - to help you find your place quickly. Bookmarks keep a link to frequently-visited websites so you can get there with a click, instead of having to type the address in the address box.