Performance
What is the performance of a laptop depends upon the type of work we will do on the laptop.
Light use (Very less use) Just sending mail, Browse on internet and social media etc.
Medium Use Basic Gaming, Browsing web, Typing or editing documents ,Photo editing etc. Want to do research work and open a number of documents at the same time.
Heavy Application, Like Photoshop ,Heavy programming ,Auto Cad etc.
Then plan the following according to the work you will perform on to the laptop.
Processor
Processor is the brain of the laptop, so a good brain gives you good power.
Processor Type
Laptop processor made by two companies :-Intel and AMD
Intel has processors like Platinum , Celeron ,Core i3,i3,i7 and i9 series etc.
AMD has processors like A ,Fx and Ryzen series.
Display
While planning your laptop another factor which matter the size of screen and right resolution .
Higher Resolution means shape ,clear and rich visual experience.
Operating System
Operating systems communicate between hardware and software, It controls the hardware of the laptop and does communication between the software and hardware. It allow the communication between you and computer, you can run your application etc.
So while planning your laptop ,Operating system is also very important.
Try to purchase a laptop with Operating systems like windows, Linux, DOS or Mac Os etc.
Port and connectivity
Port and connectivity option plan that what you can attach with laptop .You can use these port for connecting Pen drive, Mouse, Head Phone ,Charge and TV etc.
Make sure that you can have enough ports for connecting devices.
Design
Basic laptops have a traditional design with a screen fold on the keyboard and mouse pad.
Less expense then 2in1 and touch screen model.