Copywriting jobs pay much more than what you can earn via doing data entry work. In fact, copywriting work is one of the highest paying jobs that a person can get at freelance sites.
On other hand, data entry category contains projects where you can earn the lowest possible money.
Yes, this is true: data entry pay is minimum.
There are many jobs that come in the data entry category. For example: the simplest work that we can get is typing content from PDF files into word documents. Other projects include: internet researching, copy/pasting data from one source to another etc.
Thus, this category is the one where we can find the simplest/easiest work to do. No skills or experience is needed: but unfortunately, we cannot earn good money via doing this kind of work.
Some jobs even pay just few cents for an hour work.
I suggest you do not get disappointed: there are some projects where we can earn ok amount of money. We just need to find the right project at the right time.
Nowadays, more and more people want to build a website for themselves. Many people hire programmers to make a site and then they hire a writer who can write content for them.
Content writing is in demand these days. You can easily earn $5 for writing a 500 words article.
There are some projects where buyers need quality work and they are willing to pay good money.
You can even earn $20+ for writing quality 300 or so words article.
Which Job To choose?
Obviously, if you are capable of writing good content in English then you should choose copywriting. But in case your English writing skills are not good then I guess you will have to choose data entry work.