That should be a number where you can at least buy enough shares of something to make worthwhile gains. (money.stackexchange.com)
A takeover is when a company makes an offer to take control of another company by buying enough shares so they can run meetings and decide who gets elected as directors. (moneysmart.gov.au)
That happens for one reason - there were not enough shares at that price to fill your order. (capitaloneinvesting.com)