How much time will I need to invest each month to help my digital marketing efforts or improve my SEO rankings?

Normally, one would  need to invest at least one hour per week for each of the digital marketing/SEO strategies that your campaign will focus on, which should include social marketing, blogging, link building, and pay-per-click advertising, among others. The specific number of hours invested per month in a digital marketing campaign will largely depend on the competition in your industry.

i would like to inform you that it is totally depends upon the following factors 

1. Type Of industry

2. product Line

3. competition

4.budget

5.Project status - Is it at the initial stage or growth or maturity stage.

above factors determine, How much time we need spend on the Pay Per click program/paid advertising program, Search engine optimization and social Media

Its about being more effective than the number of hours

Thanks for your invitation, Instead of time consideration, can be implemented with well planning and execution and the following points can be  considered. 

It’s all about the user

It’s important to remember that the reason for the continually changing algorithms and updates is that Google has one objective—to provide the highest quality, most relevant search results possible.

Content: Focus on quality over quantity

In an earlier post I wrote on how to increase your Google ranking, I talked about using blogs to increase the number of pages indexed in Google. And while it still holds true that more pages indexed for a given search term gives you a better chance of achieving a high Google rank, it isn’t enough just to publish text optimized for keywords. The quality of the content is now a factor.

Links: Focus on quality over quantity

Incoming links have always looked good in the eyes of Google. As a result, one way to move a site up the search engine rankings was to generate a high number of incoming links all pointing to a given web page.

Make the most of social media, social sharing and social search

It’s hard to tell exactly how much impact Twitter and Facebook have on Google search results, but at the very least we know that Google is providing real-time social sharing in the search results.

Let the search engines know you’re there

Once you’ve published high-quality content, it’s important to tell Google about the content and make it easy for users to find. This means that meta titles and descriptions should closely match the content on the page.

Keyword stuffing and intentionally filling meta descriptions with keywords that don’t match the page in an attempt to deceive will only hurt your search engine results. The closer the match, the better.

The truth behind duplicate content

It’s not that Google penalizes websites for duplicate content; Google just doesn’t show it in the search results. Remember what I said in the beginning about providing the best possible search returns. When it comes to duplicate content, that’s all Google is doing.

Don’t overdo the advertising

Too much advertising can also result in lower Google rankings. This again is a result of Google’s attempts to improve search results for the user. Google tends to equate an overabundance of advertising to lower-quality or “spam” websites.

fully agree with Babu Raj Devi answer.

Thanks for the invitation. I agree with Mr. Mohammed Ashraf 's answer. 

agree with all expert answers above

Agree with Mr. Mohammed Ashraf<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<<

I believe the answers have covered the question with the right info and details... I would agree with that !

Thank You

thanks for invition ,,,,,,,,,,

i agree with experts answers

Agree with expert views, as it holds good to invest atleast 8-12 hours per week