sponsern
to sponsor
To support a person, event, or organization financially or materially, usually in exchange for advertising.
Die örtliche Bank sponsert das Trikot unserer Fußballmannschaft.
The local bank sponsors our soccer team's jersey.

to sponsor
Loading your saved state.
to sponsor
To support a person, event, or organization financially or materially, usually in exchange for advertising.
Die örtliche Bank sponsert das Trikot unserer Fußballmannschaft.
The local bank sponsors our soccer team's jersey.

'Sponsern' (to sponsor) is a loanword from English ('to sponsor'). It was adopted into German and is conjugated like a regular German verb.
Viele große Firmen sponsern kulturelle Veranstaltungen.
Many large companies sponsor cultural events.
The verb 'sponsern' (to sponsor) always needs a subject (who is sponsoring?) and an accusative object (what or whom is the person/company sponsoring?). So the structure is: sponsor (subject) + sponsert + sponsored item/person (accusative object).
Ein bekannter Sportartikelhersteller sponsert den Marathon.
A well-known sporting goods manufacturer sponsors the marathon.
Sports clubs, teams, jerseys, or cultural events such as concerts and festivals are often sponsored. The sponsors are usually companies.
Unsere Schule sucht eine Firma, die das Sommerfest sponsert.
Our school is looking for a company to sponsor the summer festival.
to support
'unterstützen' and 'sponsern' can both mean that someone helps a person, a group, or an event. 'unterstützen' is the more general word and can refer to money, materials, time, or practical help. 'sponsern' is more specific: it usually means financial or material support, often for sports, culture, or a project. In return, the sponsor often gets advertising or public attention. If you simply mean help, 'unterstützen' fits. If a company gives money and is mentioned in return, 'sponsern' is more precise.

Eine lokale Firma sponsert das Musikfest im Park.
A local company sponsors the music festival in the park.
David unterstützt seine Nachbarin nach der Operation beim Einkaufen.
David supports his neighbor with her shopping after the operation.