Do they provide a physical address and phone number? Sure, everything can be done by email, but I was once in the situation where my support ticket for an emergency went unanswered and I decided to phone the company - only to find out that they didn't publish their phone number.
I also strongly recommend not using a free web hosting company. It'll cause more harm than good. The vast majority are glitchy, slow, and unreliable. Most of these companies rely on getting customers due to the fact that they are offering a free service. The problem with that is, that is their only selling point. They don't have the funds or the tools to keep the operation alive, and bam! you're looking for new host.
The process to transfer your domain to another web account yet from within the same web hosting provider is called 'unassigning the domain'. There are some previous steps you should take to back up your email first before you delve into unassigning Hostinger your domain.
Flexibility: A flexible web hosting plan is useful because you can start with a minimum plan and later upgrade to another hosting plan when your needs grows. Web Hosts who provide only one kind of plan are always not useful for everyone.
Then you will need to look at the uptime. If web hosting companies give you guarantee uptime, look at it carefully. Most of the reliable hosting providers will give you guarantee uptime around 99 %.
This is normally not an more info issue as all the features are being displayed on the website before you sign up for a plan. However, you need to know what you need. For example: you are going to install a third-party web application, so you have to find out whether the server can support such web application or web hosting provider allows you to do so.