You will be invited to receive ordinary shares in return for some cash investment into a business.
Ordinary shares will typically all will have the same class rights. That is to say they normally all have equal rights to share dividends, and capital distributions from the company in the case of an exit or wind up. They will probably also have equal voting rights, but it is possible that a specific class of share may have no voting rights. This would be made clear to you on the platform.
Once you have accepted the share award you will be able to see the details along with their share certificate in your shareholder portfolio, and as other companies you have an interest in are added to Vestd, or you are issued with more shares in the same company, you will see all the information in one, easy to find place.
If they are to qualify for SEIS or EIS it is important that they do not have any preferential economic rights to the business.