Many peoples want that his/her resume will become more and stronger. By improving their resume they can get more sallery and the chances of get hired will increase.
Google academy for ads is a platform given by Google for students to get learn more advanced things like Google Analytics, Google Adwords etc and then to clear the exam and earn certifications.To pass here you have to get 80% marks to clear.
Google Digital Garage Certification is also part of Google. In this certification, you need to earn 26 badges. After getting all these badges you got chance to clear the last exam which you can take only 3 times.After three times you have to clear all 26 badges again to attempt final exam again.
Hubspot provides you 3 different certification. In HubSpot, you study from study material provided by them and then clear those exams.
Bing is also a search engine and just like google it is also providing the opportunity to get certified by it. Bing certification looks more attractive than other certification.
SEMRUSH ACADEMY is providing SEMrush certification. SEMrush is a paid tool which has lots of different functions from keyword searches to backlink analysis.You can get SEMrush Certification if you know how to use it properly.
So these are some certifications which you can get for free. Other certification websites are also there but they are not valued as much as above certifications.