Copywriting is the act of writing content designed to promote products or services. On the other hand, Content writing is a more general term for creating content especially for blogs or websites.
In a content writing, there is a clear difference between a content writing solutions and a copywriting solutions because they are two different type of work. Content writing providers create a variety of content, usually with longer term matters, which is enhanced for google. Thanks
Technically, content writing is just what it sounds like. "Content" designed to inform, educate, entertain, etc. Copywriting generally means writing designed to "sell" a product or service. But there is a crossover... The term "content marketing" has become quite popular in recent years. This is basically when you write content to establish yourself as an authority, or to attract an audience. With the purpose of generating leads, so you can then sell something to them.
I believe that before you start creating a headline, you should have sufficient knowledge about your product, competitors, and what you want to offer.