Saudi Arabia's 31-year-old Deputy Crown Prince Mohammed bin Salman has unabashedly pitched his "Vision 2030" reforms at the 70 percent of the staid Islamic kingdom's people younger than him, promising to unlock their "talent, potential and dedication". He has also tried to overcome Western stereotypes of Saudis, meeting foreign media to sell his vision of market-oriented reforms and a transformation of the kingdom's society. Pictures of the denim-clad prince in Silicon Valley served both purposes. His modernising message has strongly resonated on social media with younger Saudis, whose concerns sometimes seemed misunderstood or ignored by older royals, and where hashtags referencing the prince receive large volumes of traffic.

"The Saudi youth and the government are finally speaking the same language," said Manal al-Sharif, a banker and mother of two teenage girls in Jeddah. Saudis are not accustomed to young rulers: King Salman is 80, the late King Abdullah died last year aged 90, his predecessor King Fahd died in 2005 aged 84 and each was surrounded by a coterie of similarly aged royal advisers. But in a country where rapid development has caused birthrates to soar since last century's oil boom, a majority of Saudis are young, urban and switched on, using the internet and social media more than their peers around the Arab world. Photographs of Prince Mohammed meeting Facebook Chief Executive Mark Zuckerberg, and trying out a virtual reality headset, were widely published in Saudi newspapers on Thursday.

The social media barons of Silicon Valley are more relevant to many of these younger Saudis, at ease with the liberal mores of American television shows as well as the conservative piety of the kingdom's tradition, than Western political leaders.

"Prince of youth", accompanied by excitable emojis showing a purple heart, clapping hands and raised thumbs, was a typical Tweet on Thursday in response to Prince Mohammed's trip. Another Tweeted "All hopes are with the Prince of Youth".

Still, some of Prince Mohammed's moves, which include a targeted increase in women working, promoting entertainment and celebrating pre-Islamic cultural heritage, have alarmed conservatives already fearful of liberal encroachment.

Saudis are used to seeing their leaders don the formal national dress of white robe, chequered head dress and black gauzy cloak for visits overseas, and to images of them flanked by a large entourage of flunkies and fellow princes. So Prince Mohammed's choice of Western attire - jeans, jacket and open-neck shirt in California, suit and tie in Washington to meet some political leaders in Washington - and with less pomp than is usual on such visits sent a clear signal.

It is one he has already pushed at home, choosing to appear often without the fine cloak that distinguishes important Saudis, and sometimes even with his head bare - something unthinkable for his father's generation. "His visit had a double effect: on the one hand it is showing a side of Saudi Arabia that has never before been seen in the West... on the other hand he is leveraging his age in a positive way," said Dina Suleiman, a 30-year-old Saudi woman in Jeddah.

Younger Saudis face entrenched unemployment, a skills shortage, a lack of appropriate housing and a coming economic crunch as the kingdom's oil income grows ever less able to finance the needs of a rapidly rising population. Since his appointment to head an economy and development supercommittee early last year, Prince Mohammed has made addressing these long-term challenges a priority. His Vision 2030 and an associated National Transformation Plan are part of that effort. During his trip to the United States, Prince Mohammed pitched Saudi Arabia as an investment destination for American companies, securing some unbinding agreements from major corporates to look into projects in the kingdom.

The idea is to promote Saudi Arabia as a dynamic economy that reforms are unshackling from the statist model of its past with the ultimate goal of creating new private sector jobs for younger people in the country.