I help people with content marketing. Founder at @grumpytext - An online unlimited blog content service with SEO keyword research and optimization

Thanks for asking that!
There is no such particular format but our writers know how to present any niche content.
For example - A product review blog post will be written in the format, starting with:
Listing of all products with ratings
1. "Description of product
2. "Explain what is wrong within product
3. Pros & Cons
4. Buyer's Guide.

Moreover, we follow a particular personalized type - content. People love to buy from people who they can relate to. So instead of writing as a company we write as a person. Using lots of 'I' and 'you' to emphasize on having a conversation.

Being specific: People loved to be lead by their hands.
Being biased: People love conflicting opinions.

So these are the parameters we have been now training our writers to adapt and follow this format that surely bring customers.
@vikaszv95 How many words per article or is there a max?
That's per client wish. You can bid the article length according to your requirement. However, 1000 word articles are more favoured. Or maybe up to 1500 words.
Remember a 1000 word article would take max 4-6 days to complete and for more words hence more time that includes researching, kws optimizing, data collection, bringing originality, etc.
How much instagram growth can I expect in a month and for 6 months continuously?