Presale and Crowdsale are Important terms in ICO

A platform will be created for the purpose of selling tokens
Partnerships with well known companies
Partnerships can help convince potential investors of the validity of your project.
An amount is needed to be met as a target at the presale after which the general sales that take place. This is referred to as the first phase of sales in the sale of the tokens.
The advertisement of your tokens at this stage is rather important as you need to meet a predefined target in raising funds.
At this stage, the team builds a strong partnership with people in the real world. The team looks out for influencers, people who are well known in the social stratosphere. People want to know they are dealing with real people so that they don’t end up getting scammed.
The token presale is the token presale event that takes place before the official crowdsales, and the prices of the token are cheaper compared to the prices of the main ico. This is done to raise funds for the project. 30 percent of the tokens are what is put out to sale.
A presale usually occurs some days before the main sales of the tokens. It is more of a marketing technique which helps to increase the perceived value of your product. You can price the two differently but their prices should not be too far from each other. Selling your tokens before the main date should attract a bit of discount, like buying ten ether should earn a buyer extra two ethers. Investors look out for offerings that can get them some discount before the main sales so they can buy more.

Before the presales, contact must have been made to potential investors through marketing, advisors and partners. The investors must have been educated about your offerings and other vital information related to it. The role of presales falls in between marrying the investors to the tokens at a much cheaper price.

Presales helps the management  and marketing team of your company receive market feedback about the ICOs. This will give you heads up about the acceptance from the end of the market before the main sales, giving you the opportunity to make changes before the main sales.


Crowdsales
Also referred to as crowdfunding is when the general sales takes place.
This is the Initial Coin Offering. At this stage a part of the cryptocurrency is sold to investors who are willing to stake their claim on it.
Before the general sales takes place, you can employ the services of a social influencer who might help advert yout tokens. Also do not forget to incentivize the social influencer with some tokens.