An equity investment means buying a share of a company's ownership.
When you make an equity investment, you become a shareholder of that company, which gives you.
a percentage of ownership in the company;
potential money earning if the company grows in value (through dividends or selling your shares at a higher price);
certain rights, such as receiving updates or voting on important company matters (depending on the share class);
in simple terms: you invest money → you own a piece of the company → you benefit if the company succeeds.