noun
contribution, article, fee
B1
Beitrag (der) commonly means 'contribution' (e.g., Beitrag leisten), 'article' (in newspapers), or 'fee' (membership fee). It's a masculine noun with plural Beiträge (Genitive: der Beiträge). Note the umlaut in plural. No special preposition; often used in collocations like «einen Beitrag leisten».
Examples
Was für einen Beitrag wollen Sie leisten?
What kind of contribution do you want to make?
Die Redaktion veröffentlichte den Beitrag, obwohl einige Fakten noch überprüft werden mussten.
The editorial office published the article even though some facts still had to be checked.
Der Beitrag beträgt zehn Euro.
The fee is ten euros.
Details
Mnemonics
Picture several people adding pieces to a puzzle — each piece is a 'Beitrag' (contribution)
sounds like 'be + try + but' — you try to add something (a contribution)
der Beitrag — think 'der Bericht' (report) which is also masculine to remember 'der'
Notes
Beitrag has several common meanings: a contribution (to a project), an article (in a newspaper or magazine), or a fee/payment in some contexts (e.g., subscription/membership). Context determines the correct English equivalent.