1) File Size: Its fill size I so far less.
2) Unique: This button has its unique look as transparent and hallow.
3) Draw attraction: Due to its different look it catches the user’s attraction towards it if we design it properly.
4) Unobstructive: It is never obstruct what area and what background it has in it’s behind.
Conclusion: This button is used in web development to decorate the website.