Not always. It depends on the employer and their attitude towards Udemy and other sites offering these courses. As Udemy courses are not credited and bear no academic weighting, some employers do not value them and are likely to skim over that part of your resume.
However, in an interview, discussing the relevant experience you have gained from your Udemy course can be valuable. If you can discuss how the courses or projects you have undertaken relate to the job or have developed your skills, some employers will value that. They will also value your commitment and dedication to continuing to develop your skills and knowledge.
Employers will value the skills and experience you have gained from your Udemy course rather than the certificate itself in these cases.