A combination of the words "pub" and "bug" make a great 6 letter domain which could be a reference to publishing bugs (as in software) or getting the bug for drinking in pubs.
The name "pubbug" has only six letters and just two syllables. Two syllable names make popular global brands. Examples of popular two syllable names include Buffer, Disney and WeChat.
This domain was first registered in July 2009. Older domains have an advantage when ranking in search engines.
Pubbug.com is a dot-com domain. Dot com domains are the most valuable domain extension in the world, famously used by websites like youtube.com. When most people think of a website, they think of a dot-com.