re review 2022

 I am sure you will get a long list of the exact same answers from a lot of people, the goto unsustainable ands/or blackhat answers and excessive PPC. You will be told to do rebates, giveaways, buy reviews and who knows what else. They can and will pump up your sales rank but each has its own potential consequences and none of them drive any kind of sustainable profit so you can reorder once you need to. But if all you care about is sales rank, yes rebates and giveaways(both against TOS) manipulate and increase sales rank.

Use systeme.io is best tool if you want to increase sales and sales rank 

At the end of the day, do you deposit sales rank in the bank? I don't, I deposit profits. actually, money made after the sale and all expenses have been paid. Giveaways and rebates do not drive profits, neither does sloppy PPC. If you meant to say how do I increase my sales and produce profits, then this answer will contain several methods I suggest that you consider doing more than one of them.

First, how well do you know the target buyer? 
What drives the desire to purchase? 
What emotions does it satisfy or problems does it solve?
Why are they considering buying the product? 
Why should they buy from you instead of a different seller?(price is the wrong answer)
Where does your target audience congregate on the internet? 
What do they talk about the most that is relevant to your product?
What do they like the most about competitors' products?
What do they like the least about competitors' products? 
Who do they get their trusted information from on the Internet?
What influencers do they worship?

The answers to the questions above form your buyer personas. Having those answers from them and not guessing, will enable you to write listings that motivate purchases. It will enable you to target better with words that resonate with them. Getting them right will increase sales because your listing will be able to close more sales. If you don't know the answers to the questions above or if English isnt your native language, do yourself a favor and spend the money on a real, native English-speaking copywriter.