https://hallellis.co.uk/stays-execution-judgments/
Types of Stays
A stay may be:

permanent or temporary
made in respect of the whole of the proceedings or only part of them
imposed automatically by the rules of court
fixed to remain in force until a specified date or period of time, or upon the happening of an event
made contingent on some future event
Why they are Used?
Stays may be ordered where:

a point of law is being argued in a higher court, and the decision in that case would narrow the questions of law to be decided in the current case: R (Ahmed) v Secretary of State 2009 EWHC 466
an arbitration of the issues in dispute before the court are being resolved
time is required for some other event to conclude, such as:
hearing and handing down of judgment in an appeal
payment of sums in court after an order for security for costs has been made
end of a period allowed for the parties to attempt to settle their disputes by mediation
it is otherwise desirable in the interests of justice.
For instance, it may be desirable for the court to impose a stay to encourage compliance with its orders by the parties.

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Note added at 53 mins (2020-05-24 12:31:48 GMT)
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Eid Mubaraka Said