Types of Funding Rounds in a Startup

1. Seed/Angel Round- The seed round usually happens when the company is in the initial stage of setting up the business or they only have the idea to start the business. But in the initial stages of  business they don't generate enough cash flows to pay off there daily running costs of business. So they need money for their daily expenditure. Despite the name, both seed and angel investment rounds usually include a large proportion of funding from family or friends. It can also include money from angel investors who are focused on early stage companies. Typically investors put little money in exchange of equity as risk is more in companies which are in there initial stages because they don't have track record, how they perform in the past, how is the management of the company.
The Capital raise during this phase is roughly around $5 lakh to $2 million. 
Example
1. Noida based student housing startup Placio has raised around $50,000 in seed funding for its new venture in subscription based food delivery system.
2. Bengaluru based mutual fund startup Groww has raised around $3.2 crore in seed funding from various angel investors/venture capital fund.

2. Series A - After the business has been setup then Series A funding is useful in optimizing product and user base. Series A rounds are traditionally a critical stage in the funding of new companies. A typical Series A funding round is in the range of $2 million to $10 million, purchasing 10% to 30% of the company.

3. Series B - Series B round talks all about taking businesses to the next level. Series B funding is required by the company to scale up the operation, to face competitors and to have a market share. Goal of this round of funding is not only to have break even but also to have net profit. In this amount of funding is more than series A funding.

4. Series C - The Company goes for series C funding when it looks for greater market share, acquisitions or to develop more products and services. Series C round of funding can also take place to prepare the company for an acquisition. It is the last stage in company's growth cycle before Initial Public Offer (IPO).