Both PC and mobile phone are good for using the internet but it varies.... Here are my point of view and insights for which is better to use, PC or mobile phones to access internet.
For me, I prefer using PC because it has huge monitor or bigger screen and a mouse for easy navigation when searching on the net. The storage is bigger compare to mobile phone specially when I have to download files and videos online. Surfing net using PC, every web page is well display compare using the mobile phones, sometimes there are missing link or I overlooked some links. I observed that most people use PC for work, emails and streaming online series. In addition, the stability of internet connection is great compare to the mobile phones, because in mobile phones their connectivity is unstable and it depends on their location and mobile network.
On the other hand, smartphones now are the most popular device or way to browse on the internet. Most of the people have mobile phones and they carry it wherever they go. So, online access or internet is very accessible for them. Even me, I use my mobile phone browsing the internet specially when I am not at home. Most of the studies of people who access internet via their smartphone dramatically increases as time goes by. It is because of the innovation of mobile phones to make people to have online access with their fingertips. Some people are comfortable using their mobile phones when surfing the net. In terms of portability, of course mobile phones are light-weight and can ft in a purse or pocket. I observed that people mostly used their smartphones for social media, games and searching information on the internet.