The phrase "expand the functionality of" is grammatically correct and can be used in written English.
It means to increase or improve the capabilities or features of something. Example: "The new software update will expand the functionality of our mobile app, allowing users to access more advanced tools and features."
It's also another way for Twitter to expand the functionality of its platform.
The hackers continue to tinker and expand the functionality of the technology.
So, it would make sense to expand the functionality of the available MP3 Model with such features.
First, it helps Viber expand the functionality of its gaming platform, and significantly to expand the kinds of services it is offering to developers.
Plaxo Premium Services expand the functionality of Plaxo and include Plaxo Address Book Optimizer, Plaxo eCards, Plaxo Mobile Access, and Plaxo VIP Support.
Nowadays, the efforts of researchers are directed on the selection of modifiers that would expand the functionality of TiO2 coatings without reducing their photocatalytic activity.
An Alibaba team set out to create a better alternative by expanding the functionality of the company's employee portal.
The store will be integrated with ImpressPages' interface so its existing users will be able to see additional tools available for expanding the functionality of their website, it said.
Instead, signs point to Facebook expanding the functionality of its internal search engine to answer more of the questions you might Google.
But I suspect for now that they'll keep doing what they're currently doing while at the same time expanding the functionality of geotagging tweets.
Klout, the startup that measures influence on Twitter, LinkedIn, Google+, Facebook and other social media sites, is expanding the functionality of its Perks program.
