Samsung (005930.KS) has done well with its Android devices, having sold a million Galaxy Tab tablets, and over 3 million Galaxy S smartphones, taking up a significant chunk of all Android phones sold in the U.S. So the manufacturer has seemingly earned its bragging rights, boasting a 300 percent increase in Android market share since the fourth quarter 2009.

The numbers came from a Gartner report, and were shared at a Samsung event yesterday. The success has proven encouraging, as Dale Sohn, president of Samsung Mobile, said “the Galaxy S portfolio has played a significant role in Samsung’s success in 2010 and we are extremely excited to show you what products, services and innovations we have in store.”

Android Market improves search & discovery

To keep manufacturers and end users happy, Google (GOOG) is making tweaks around the Android Market in particular, improving its ease of use. A new “similar” tab has been added to app details, so you can discover other apps akin to the one of interest. It’s a simple tweak, but one that shows Google is paying attention to at least some basic navigation, search and recommendation needs for filtering its growing database of mobile apps.

It’s also a move Google needs to continue to build around, with the Android Market potentially losing ground to third-party directories and search tools. Gaming platforms have been filling this gap, providing cross-promotional marketing and discovery tools for end users.

Gameloft Advent deal extended

In other gaming news, Dungeon Hunter is taking a cue from other Android titles this holiday season, with an extension to its 24-hour promo. Part of Gameloft’s Advent Twitter campaign, which offers a new promo throughout the month of December, Dungeon Hunter had some extra time tacked on, due to download issues for some users.