As you know that the PPC means pay-per-click, a model of digital marketing in which advertisers pay a fee every time one of their ads is clicked by someone. Essentially, it is a way of buying visits to your website, rather than attempting to 'earn' those visits non-paid.

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SEA (Search engine advertising) is one of the most popular forms of PPC (Pay Per Click). It allows advertisers to bid for ad placement in a search engine's sponsored links when someone searches on a keyword that is related to their business offering. For example, if we bid on the keyword “PPC software,” our ad might show up in the very top spot on the Google results page.

Visit for more detail about PPC (SEM) -
https://support.google.com/adwords/topic/3119115?hl=en&ref_topic=3119071